Holley sniper acceleration enrichment. May God's grace bless you in the Lord Jesus Christ.

• Holley sniper acceleration enrichment A = Acceleration Enrichment B = Boost Setup C = Trans Shift Parameters D = Drive-By-Wire Settings E = Engine Parameters F = Base Fuel Table G = H = I = Idle Parameters Holley Dominator MPFI & DIS, Holley 36-1 crank trigger, MSD 1x cam sync, PA PMGR starter, PA 200A 3G alternator, Optima 34/78 Red battery, 100HP dry progressive direct-port But aside from timing, things look pretty good under high MAP acceleration. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. It involved opening the throttle blades quite a bit and adding some more Cranking Fuel, and then adding temperature enrichment to get the car to idle more consistently after the Acceleration Enrichment decayed. But with your progressive link installed it is only going to dump two barrels of air in Sniper Progressive Secondary Link--A Great Solution for Abrupt Throttle!When folks install their new Sniper 4150, Super Sniper 4150, or Sniper XFlow on their high-horsepower engine, usually there are two reactions. Good luck and enjoy the Sniper. The power user who wants their tip-in to be perfect may tune every table. Under Fuel, Acceleration Enrichment, AE Correction vs TPS. Timing: 12-15° initial (I was playing around), 42° total. 623" lift 114° LSA H/R camshaft, Trick Flow Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. sniper. At a quick glance, you need significantly more Acceleration Enrichment in the area you're concerned with. 2 block, Eagle forged steel crankshaft & H-beam rods, Wiseco I have my Sniper installed on a 1979 International Scout II with a 345ci V8 engine. Primary AE fuel addition can be triggered by MAP or TPS based tables and other tables, such as TPS vs. In the Acceleration Enrichment settings the TPS RoC Blanking value is 5 and the MAP RoC setting is 7. The fuel pressure may below the required pressure. Tags: None. If I stay in it and keep the RPM high it seems to accelerate fine, or better, but this surge action has me wondering what's going on. • Closed Loop & Learning isn't active during periods of acceleration enrichment or deceleration (zero TPS, 400 RPM above target idle). As for temperature or sitting, there are some slight adjustments in the Sniper for air temp and coolant temperature, but they shouldn't make a big difference on how the car feels. When I let off the throttle and the engine is slowing the car down (4 speed manual), I'm getting an exhaust backfire. Hoping someone can shed some I think everyone would've expected you were using Sniper to perform the 2-Step rev limit function. You tune the acceleration enrichment after the sniper has learned the fuel table. Your Datalogs are in the "Documents", "Holley" folder, "Sniper" folder . I'd like to know what would be the best settings to tinker Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. I'm stumped. (EFI Acceleration Enrichment In Carburetion Terms) May God's grace bless you in the Lord Jesus Christ. Feb 5, 2023 · I'm having an issue with a Holley Sniper 4150 style TBI. There are some things that it will not Learn though, and that's where the Sniper EFI software comes in. Post Cancel. “For those power users, after the introduction of these new features, the only remaining limiter with the app is the screen size and touchscreen interface, which makes dealing with Bogging, Acceleration Issues after New Sniper 05-08-2022, 01:21 PM Good Afternoon All. Comment. Raising the number increases the amount of fuel INSTALLER/TUNER OR CONTACT HOLLEY PERFORMANCE TECHNICAL SERVICE FOR ASSISTANCE. Vacuum: via MSD software, it seems like 15°, but I My '71 Blazer, manual, 350 V8 is running pretty well with the Sniper. Fuel ICF Tuning - Acceleration Enrichment There are several tuning strategies when tuning Acceleration Enrichment (AE) that will end in a similar result. So I feel like it may be a setting, I've tried maxing out the acceleration enrichment with no help. If you're running E85 you'll need significantly more lbs/hr for AE I would think? '69 Camaro, 400 SBC, ProCharger D1SC Sniper has been on my car for a while now. Jun 9, 2013 · Acceleration Enrichment can't be tuned until the Base Fuel Table is well tuned. There is no completely right or wrong way. Attached is the new datalog and GCF file. They sent a new unit. The Sniper BBD is supposed to be self-regulated at 60 psi as well. The reason it's going rich after the lean spot is due to the Closed Loop Compensation and the Learn Table are adding more than 30% fuel to (over correct) correct the lean condition. I have installed several springs from firm to soft. The question I have is the best way to fix this lean condition at VERY light throttle tip-in/acceleration. Change the AE vs TPS RoC Blanking value to 4-7. With MS there is an acceleration enrichment tableI would think that Holley has something similarits a tuning issue, not a throttle spring issue. A rapid throttle application will exceed the Acceleration Enrichment Rate of Change Blanking value and the system will go into Open Loop. You may have to register before you can post: click the register link above to proceed. You'd tune Acceleration Enrichment the same way. This is an EFI software question. Let it Learn for about 500 km, then made a few adjustments to the timing & fuel tables, and was happy with the result Engine made good power Aug 10, 2021 · The Holley Sniper EFI will intermittently inhibit Closed Loop at idle, if the AE vs TPS/MAP RoC Blanking values are set too low. The Target Air/Fuel Ratio Table & 5 INTRODUCTION & SYSTEM REQUIREMENTS Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. It is currently set to 12:1. Big Block V8 - 385 Series (6. 03-30-2018, 10:11 AM (Holley Sniper EFI Help File - Page 10) May God's grace bless you in the Lord Jesus Christ. Oct 28, 2020 · I'm having an issue with what I believe is the MAP Acceleration Enrichment table adding fuel during low RPM/light throttle conditions. My car is running great as far as stop and go, cruising, WOT, etc. No matter what I do, it goes dead lean under 3000 RPM and a quick stab WOT. Recently I went and connected my laptop to add small amount of Acceleration Enrichment on initial throttle opening, sent it to the Sniper, disconnected the laptop, cycled the key off, then back on, waited for the prime and went to start it. Is that a good place to leave it to let it adjust for weather variations? Jul 3, 2021 · Chasing Rich Acceleration 07-03-2021, 10:38 AM. Oct 21, 2022 · I also did the other recommended changes to the timing and Acceleration Enrichment, but I still get the lean spike when pressing hard on the throttle. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a “criss-cross” pattern (60-80 in. The first set of injs lasted long enough to run the Power Tour. hefi table as a starting point. Don’t go in and hit the fuel May 23, 2020 · Sniper EFI Tuning & Tech. I see in the datalog file that it goes rich then goes pretty lean, then levels out. 5/460) - Holley Sniper 460 - Backfire / Low End Torque Issues - Hello Everyone, Just have a couple questions regarding some datalogs from my 75 F150 with a 460. 1972 Chevelle with 540ci BBC, Edelbrock 290 Ovals & Holley Sniper 4500, I enriched the Acceleration Enrichment to the point that the engine stalls when I depress the gas pedal. Looking at the datalog (to me anyway) it looks like the Rate of Change Acceleration Enrichment won’t help much as it's such small throttle input. '92 Ford Mustang GT: 385"/6. Like the pump shot on a carb. I have an inj flow bench, so I ran all 4. ) Volumetric Efficiency (VE%) Operation – The option of a Volumetric Efficiency based tuning strategy is now optional. Then 1 inj died. Acceleration Enrichment can't be tuned until the Base Fuel Table is well tuned. ) 3) When the car is fully warmed up and in Park, modest revving of the engine causes it to stall on the way back down in RPM with a high rich reading. Become your own tuner today! Acceleration Enrichment. • Ensure the switched +12V red/white wire (pink wire - Sniper EFI) is powered in the "Run" and "Crank" key positions You can plot an Acceleration Enrichment lb/hr curve by watching the "live The Holley Sniper EFI will intermittently inhibit Closed Loop at idle, if the AE vs TPS/MAP RoC Blanking values are set too low. If I'm go from 10 Holley EFI Sniper EFI If this is your first visit, be sure to check out the FAQ by clicking the link above. It's much more intense when coming off of hard acceleration. Second one died. I'll update the thread when I have more results. Any help tweaking this? In Basic Fuel, my Acceleration Enrichment is around 55. Hello All. (Holley Sniper EFI Fuel System Plumbing - Posts #2, #6, #14) May God's grace bless you in the Lord Jesus Christ. The Acceleration Enrichment in particular will be much lower (by a factor of 4 in the low TP change levels and by a factor of 2 in the higher levels), and this is likely why your system is going so rich when you accelerate. Right now your Learn Table is a mess and it may be necessary to Clear the Learn Table. With large air flow and injectors, it's a sensible feature but poorly documented. Before you start tuning the acceleration enrichment, make sure your VE tables are dialed in. There have been ECU firmware updates since then, and consequently the Sniper EFI AE vs TPS RoC Blanking threshold value has been decreased to "7" (before Jun 30, 2017 · Sniper EFI Tuning & Tech. This is manual transmission, mild 350 SBC. '92 Ford Mustang GT Provides Real-time ECU tuning, allowing you to dial in your AFR, Ignition Timing, or any other handheld tuneable value, such as IAC or Acceleration Enrichment! Expandable storage via included micro-SD allows you to quickly access the ECU calibrations, datalogs, or any other files you may use with your Sniper EFI System If you're not using these, uncheck them as it's less work for the Sniper and you don't end up with active ground circuits outside the Sniper CPU. Login or Sign Up Logging in Remember me. Jul 10, 2013 · Acceleration Enrichment can't be tuned until the Base Fuel Table is well tuned. Change the AE vs TPS RoC Blanking value to 4-6. -Changed all the Acceleration Enrichments back to the initial Wizard settings (other than changing RoC Blanking from 15 to 12 as recommended). I've copied/renamed files in case something was corrupted. MSD 2-Step would work fine on a Carb as it only fuels based on the air drawn Software: click "Help" tab (top toolbar) & "About Holley EFI". I have enrich up the Target A/F Ratio map as low as 12. I'm having a HARD STARTING Jun 25, 2019 · "Acceleration Enrichment The “Acceleration Enrichment” tables perform the same function as the accelerator pump on a carburetor. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration . The Holley Sniper EFI will intermittently inhibit Closed Loop at idle, if the AE vs TPS/MAP RoC Blanking values are set too low. Any help would be greatly appreciated! • Closed Loop & Learning isn't active during periods of acceleration enrichment or deceleration (zero TPS, 400 RPM above When accelerating from a stop that's off idle and up. After Reaching 180°F coolant & 100°F intake temperature, the car starts sputtering during acceleration. It made a huge difference and 95% of the lean stumble is now Holley EFI Sniper EFI If this is your first visit, be sure to check out the FAQ by clicking the link above. Firmware: click "Sync With ECU" & "Get ECU Info" (Key-on/USB connected). Has Holley released any base calibrations for the Sniper Stealth? That might at least help me with the Acceleration Enrichment fuel tables. Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and Jun 16, 2021 · Once the throttle opens up the IAC just goes and sits in the corner and waits for the engine to come back to idle. I've had my Sniper system with the added later HyperSpark distributor for 3+ years with much success. Closed Loop & Learning isn't active during periods of acceleration enrichment or deceleration (zero TPS, 400 RPM above target idle). Change these to 15 for now. We researched and read a lot and this is the build: GM performance ZZ4 short block with forged crank/rods Rattler 7 1/4 balancer Trick Flow Super 23 175 heads Full roller rockers 1. It *possible* (although beyond my knowledge) to get it dialed in perfectly, but using the handheld and The acceleration enrichment that is calculated based on the throttle position is expecting four barrels of air to be dumped into the manifold. Idle Control Tuning. I hope all is well. If this doesn't work, then I might try to enrich the idle Air/Fuel Ratio some to compensate. 5 ratio Holley Sniper 4150 TBI Holley Dual Sync distributor MSD street fire CD box Using the Holley Sniper EFI software Just a theory here as I've never run E85, but the Acceleration Enrichment tables in the Sniper are based on gasoline and are in lbs/hr. Would really appreciate the experts advice here. Is there anything I should change? 5 INTRODUCTION & SYSTEM REQUIREMENTS Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. I heard I can adjust the acceleration enrichment for this, but it's not recommended until the Sniper is done Learning. Learning & Closed Loop operation doesn't take place during the short acceleration events. The more I cruise around the worse it gets. 8, and You need a different tuner. Page 1 Sniper Stealth 4500 (550-841 Shiny, 550-842 Black, & 550-843 Gold) Holley Sniper EFI FUEL INJECTION INSTALLATION MANUAL; Page 2 Failure of any one component does not constitute, nor does it justify, warranty of the Sniper EFI Tuning & Tech. This, on top of very bad timing will lead Holley Terminator X Training Course Part 19: Acceleration Enrichment walks you through how to properly tune the acceleration enrichment tables within the Ter Within Holley Sniper EFI software, select system parameters, EFI parameters. Jun 12, 2023 · C3 Tech/Performance - C3 - Holley Sniper for Dummies - Level 2 - Holley Sniper Notes and Tuning Supplement for users by users Current Revision of Post #1 listed at the end of post. 0 using increments of 1 after the 11. 0, 13. I thought as soon as additional fuel comes from Acceleration Enrichment the ECU changes to Open Loop. He replaced the old linkage with a cable throttle and that made a big difference, and after It's not random, it's an algorithm. I tried adjusting the Acceleration Enrichment to a more rich mixture, but that didn't seem to help at all. Oct 4, 2018 · Sniper EFI Tuning & Tech. 0 values in the scale/table under the Fuel ICF>Acceleration Enrichment>AE vs TPS RoC and AE vs MAP Roc tables? Both tables look like this right now: 0. Sniper EFI Tuning & Tech. Holley replaced it. Two quick questions. THE FIRST DATA POINT IN THIS TABLE IS LIMITED TO A VALUE OF 20%, The Sniper 2 EFI 5-inch Digital Dash comes out of the box, ready to plug and play with your Sniper 2 EFI ECU. It always did whistled/slurped like in the video when accelerating under 50% throttle. If you have a momentary lean spike, on light throttle acceleration, read below: What Holley calls a "blanking value" is just a threshold value; the value at which the AE curve starts. These settings are somewhat typical of a QuadraJet and they are too low for an initial tune. The Coolant Temperature Enrichment % and A/F Ratio Offset must be at 100% & zero to enter Learn mode. The Acceleration Enrichment curves do not have anything to do with the IAC. I know you can see Acceleration Enrichment happening in the AE curves as you scroll through a datalog, The Holley Sniper EFI Every wanted to be able to tune a Holley Sniper system? We have developed an in-depth training course using Holley Sniper software to dial your Sniper to perfection. Other QuadraJet setups I looked at show a nearly linear slope from 0 to about 25. I changed the AE vs TPS RoC Blanking Value to 4, AE vs MAP RoC Blanking Value to 5. Perhaps the source of that is that it might be easier to fine tune the Sniper's idle and acceleration enrichment with a single plane. I'd increase Acceleration Enrichment until the lean spike disappears. Since the acceleration enrichment is stacked on top of the fuel the ECU is commanding based on the VE 2. Please be aware that this is a community forum. . 470" forged steel crankshaft & H-beam rods Sep 25, 2021 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. This basic manual contains the information necessary for the installation of Sniper EFI Tuning & Tech. 5 KB, 36 views) Comment. The Holley Sniper EFI will intermittently inhibit Closed Loop at idle, It is important to get the IAC Position proper as this will affect off idle and light acceleration performance. Then enable 'Progressive Throttle Linkage' Set the 'Primary to Secondary TPS switch' % at the point the secondaries start to open. So I can't say that the default is bad. A page calling itself a shop, says you have to account for the added travel of the longer arm, and AE TPS vs Rate of I recently installed this Sniper EFI on a 1978 Toyota Land Cruiser. Sent the unit back to Holley. Join Date: Oct 2017; Posts: 49; Share Tweet #2. 5 in the 1500 to 1650 cruise range, still POPS! Once the Sniper Learns some more and I get the fuel map nice and smooth l'll give it another go at WOT to see what it does then. (Again why I'm wondering how long it takes to fully Learn. When the Sniper was a bit newer on the market there were a lot of internet recommendations to use a single plane manifold. The engine needs to be at "steady-state" RPM for the Learning to function, at lower RPM. I raised the Acceleration Enrichment to about 55. The engine is a Buick 455 (basically stock) Jul 27, 2015 · Acceleration Enrichment can't be tuned until the Base Fuel Table is well tuned. Adjust the AE curves as needed and don't worry about the IAC. (I'm pretty sure right now the Acceleration Enrichment is too rich, but it's a bit hard to tell with the AFR noise. Use the EFI V5 TBI85BB215HE. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series Hey guys, really hope that you'll give me some hints. Saluqui. The latest software & firmware can be tuning tips – acceleration enrichment: Tuning Acceleration Enrichment (AE) isn't entirely necessary - if you don't want to mess with it. To start viewing messages, select the forum that you want to visit from the selection below. Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table (enrich or lean) & How to Tune Acceleration Enrichment in Holley EFI // Terminator X, HP, Dominator & Sniperonce again, i made a video too long. This basic manual contains the information necessary for the installation of the throttle body, wiring, and sensors. It was hot idling at 40% IAC, which was also impacting the cold starts. Made it better, but not perfect. When I'm not using A/C, the system works very well. To Hey guys. Originally Posted by Danny Cabral Formerly, "15" was the suggested value for both AE vs TPS & MAP RoC Blanking, per Holley Tech and the Sniper EFI instruction manual. If you have a momentary lean spike, on light throttle acceleration, check your AE vs TPS/MAP RoC Blanking values (in Fuel Modifiers/Fuel Control): If they're 15 & 7, those are the old values from the V1 firmware. SHINER · Premium Member. Member. With a Stealth system, you get that carburetor styling but the functionality of a Sniper! This 4-barrel system features a single pattern bolt on design built to fit 4150 flange manifolds. If these values aren’t adjusted correctly, the engine may not get the fuel to start smoothly in cold conditions. 5 KB, 43 views) 4150_24_Z102622. But there appears to be a Lean Spike slowing down RPM increase which I'll try to fix by enriching the AFR when on transbrake or the Acceleration Enrichment. I installed in April, and until about a week or so ago it's been flawless. Please help. Advanced Tuning. Install the throttle linkage to the Sniper EFI throttle body. 623" lift 114° LSA H/R camshaft, Trick Flow Aug 5, 2021 · Startup settings and Acceleration Enrichment, for example, can only be correctly adjusted after your basic setup is proper and that the system has had a chance to Learn. Spark Timing Modifiers. This happens between 1200 to 1800ish RPM. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series Sniper EFI Tuning & Tech. 0 If I have understood the Holley Sniper EFI system, Closed Loop & Learning are disabled during Acceleration Enrichment events, hence masking Learning. Page 10: (Holley My question is; how do you change the 0. 502 engine and a Holley Sniper, and he was experiencing the exact same symptoms. more. For instance: My Acceleration Enrichment defaults at 49, the instructions shows it at 17. Oct 26, 2021 · Holley EFI; Sniper EFI; If this is your first visit, Your Acceleration Enrichment looks close. 1971 Trans Am 535ci Sniper XFlow Pro-Tour car (next on list). Log in. Spark Timing Tuning. I define modifiers as Acceleration Enrichment, temperature enrichment, etc. Thus, Holley can not guarantee an answer or timing on an answer. Datalog and GCF attached if anyone has time to review. Content is constantly being Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. Adding a correctly tuned amount of acceleration enrichment to an incorrectly tuned fuel table is still going to result in an incorrect amount of fuel. I've adjusted timing, startup fuel, Acceleration Enrichment fuel and other parameters to get my engine to run as good as it does. The tune I bought uses 20%, but again, I'm not sure that would have I've updated the ECU firmware, and reloaded the Holley Sniper EFI software. A second factor that seems to be showing up in some Sniper 2 Wizard tunes is that the Acceleration Enrichment vs TPS RoC Blanking value is only set to 5. Feb 7, 2023 · I have a QuadraJet version of the Sniper EFI and I'm using the HyperSpark ignition system, which is timed correctly. movement is invoking Acceleration Enrichment which then causes the RPM drop. Lately though it's developed a strange surge at idle and light acceleration. Jun 3, 2021 · If Closed Loop is on it stays on unless during those moments of Acceleration Enrichment or deceleration are encountered. Very slight accelerator/TPS movement will cause the system to go into Open Loop and unless the Base Fuel Table is perfect you will end up with rich or Sniper EFI Tuning & Tech. I've changed it to try to get Acceleration Enrichment to activate during light to medium TPS changes as I rarely see any TPS RoC above 8% at idle or steady 496 BBC/Sniper 650 Acceleration Problems 03-09-2020, 09:36 PM You'll see that after the Accelerator Enrichment shot my AFR goes up to and stays above 20 and as high as 30. I followed the Holley Sniper YouTube video to create a new custom Base Nov 8, 2021 · Sniper EFI Tuning & Tech. I've increased the VE% and got that close and had the AE maxed out in multiple enrichment tables for large throttle changes, and it would still go dead lean and fall on its face. holley. 623" lift 114° LSA H/R camshaft, Trick Flow Street-Strip-Show-AutoX. Basic functions such as fuel, ignition and idle programming are covered as well as more advanced features such as closed-loop fuel control, rev limiters, fail-safe protection, boost control, nitrous, water / meth tuning and much more! It's a minor issue above 180°F. When accelerating from idle there may be a temporary rich condition because you're not getting the necessary air to support the amount of fuel the Sniper is told to deliver. Have turned Acceleration Enrichment down to 20 PPH. N/C. It doesn't do it on a harder acceleration. First, I have a new Sniper and I don't think that my Acceleration Enrichment is working as it should. 3 worked, one was a dead player. AFR still seems a bit noisy in transient areas (throttle opening or closing quickly); do you know if the the Sniper is supposed to be able to 'learn' Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). 91 gears and a Tru-Track, UMI suspension with Konis, big brakes, 6-point roll bar, lowered, Boze Forged 18 ACCELERATION ENRICHMENT ACCELERATION ENRICHMENT Changes the “accelerator pump” function of the fuel injection. I have a Holley Sniper EFI system on my '38 Chevy Street Rod (Goodwrench 350 with upgraded heads and original cam, 700R4). Still getting swamped with fuel on low speed acceleration, AFR goes down through 8. I've been successfully tuning out my rich deceleration (thanks to the help from all of you), and I've noticed some issues with the AE. 406 SBC with progressive single stage of nitrous, Dart SHP block, Dart Pro1 heads, Holley Sniper EFI with HyperSpark, Comp Cams, NOS Cheater plate with Powershot solenoids. , but there's one small issue (hopefully) that I'm trying to tune out. This problem started about a week ago, the engine goes lean and stutters when accelerating at low RPM. 470" forged steel crankshaft & H-beam rods, Wiseco 4. At cruise the AFR is already fat enough. It have a large lean AFR when I go WOT from a stop. I have one question and a few notes I was getting a constant lean stumble when easing into the throttle. This is in a Pontiac stroker 468 with a Sniper/Performer RPM intake (PMed), old Performer Jul 13, 2021 · Sniper XFlow instructions don't seem to mention progressive throttle setup. Holley EFI runs Closed Loop even during Coolant Temperature Enrichment (unless you've changed it from the base calibration). forums. 0/429, 7. Save Share Reply Quote Like. I've had the stumbling problem from day one. Raising Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. Jan 10, 2025 · Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. The 5-inch digital touch screen display is pre-loaded with 3 easy to read layouts that provide critical system information, such as Throttle Position, Manifold Air Pressure, Air Fuel Ratio, Battery Voltage, Engine Coolant Temperature, RPM, and Speed, thanks to the Please be aware that this is a community forum. This recommendation has subsided. A more gentle The biggest odd thing for me is the point you bump the throttle and it goes into Open Loop, the TPS sticks at 1% for several seconds and there's excessive Acceleration Enrichment. Learn is set at 10%. Sniper_0014. What I have: Charger 1971, 383 big block, Indy tunnel ram, mild cam from Edelbrock, 2x4 Sniper EFI, MSD ignition with CDI box (connected without timing control). I did find that lowering the IAC Hold settings got rid of Using the Holley Sniper EFI software (LINK), I think the AE enrichment only pertains to when you first snap the throttle open. Remember it won't learn under acceleration, deceleration, and if temp<160F. 5 INTRODUCTION & SYSTEM REQUIREMENTS Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. I suggest adding some fuel at the RPM your having trouble at. Some of that may get better with self learning. Not to mention, I have no faith at all in chassis dynos. The truck gets great mid to top end power but suffers down low. May God's grace bless you in the Lord Jesus Christ. If you want to go down the rabbit hole, search PID control. I've attached the Config File. The Acceleration Enrichment AE vs TPS/MAP RoC Blacking Values in the Fuel Modifiers/Fuel Control were 15 &amp; 7. If everything was good except WOT, then perhaps your Acceleration Enrichment needs to be adjusted up or down. lbs. Login or Sign Up Some days it'll do this once, some days, it'll do it a half dozen times on the way to work. They give a quick shot of extra fuel when the throttle pedal is pressed to eliminate a lean hesitation. Sniper QuadraJet has small primaries & large progressive secondaries. 9444#post29444 (EFI Acceleration Enrichment In Carburetion Terms) I also noticed your IAC Parked Position is 30%. ) 5 INTRODUCTION & SYSTEM REQUIREMENTS Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. 0, 12. One thing is on acceleration in 3rd & 4th, it accelerates very rough; "bumpy" & slowly. It seems complicated with 6 different subsets, but those subsets go largely There are actually six (!) acceleration enrichment parameters you can get into using a laptop, cable and Sniper software. Before I do any changes I would like to hear from someone who did this, if they have any advice for me on what and "how much" to change. I forgot to mention that the Acceleration As suggested, fooling with acceleration enrichment is part of it, but progressive linkage affects the base map too. This website Tuning Sniper Progressive Link discusses other related tuning issues around Acceleration Enrichment. 125” throttle bores as the base Sniper. Thank you, Chase Using the Holley Sniper EFI software (LINK), Aug 2, 2021 · I am going to write this specific to Holley’s Sniper and Terminator X throttle body EFI systems but most of this is going to apply to some degree to all advanced EFI systems intended for street use. I then worked with the tuner remotely to address this. We explore a data log to illustrate the Holley EFI Training Course Part 19: Acceleration Enrichment walks you through how to properly program the acceleration enrichment based on the rate of change in MAP and TPS. Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. Spark Timing Basics. Just finished installing a 4150 Super Sniper with HyperSpark ignition on a 63 C10 with a Gen 1 SBC and a very mild cam. Holley Dominator MPFI & DIS, Holley 36-1 crank trigger, MSD 1x cam sync, PA PMGR starter, PA 200A May 1, 2020 · We put the Sniper on a BBC. The whistle that you hear at WOT is common with the Sniper and can be fixed by using a spacer. The Acceleration Enrichment versus TPS Rate of Change graph/table seems odd. It happens during acceleration from cruising around 1500 RPM. A faulty coolant temperature sensor (CTS) can also be at fault. Also attached is the current GCF. youd notice on a lot of OBD2 vehicles that sudden dropping off the throttle will put the vehicle in open loop, a big part of that is staying in closed loop, with a dramatic drop in throttled air, then a delay in which a IAC steps in to control the idle air, and the drop in load on the engine. zip (8. Jun 23, 2022 · Provides Real-time ECU tuning, allowing you to dial in your AFR, Ignition Timing, or any other handheld tuneable value, such as IAC or Acceleration Enrichment! Expandable storage via included micro-SD allows you to quickly access the ECU calibrations, datalogs, or any other files you may use with your Sniper EFI System Sep 12, 2019 · The Wizard also puts the same Acceleration Enrichment fuel in for a Sniper Stealth with 2. This means that with slight to modest throttle application the system goes into Open Loop. I know I'm not supposed to play The nice thing about a Jet is they're *very* easy to get a base fuel map as it's almost 1D, and once I can get cleaner AFR signals I'll be able to tweak my Acceleration Enrichment as well to avoid any temporary rich/lean dips. 07-04-2024, 03:47 AM. Apparently, from my reading and not direct knowledge, there are some buried conditions in the Sniper programming logic from Holley that can also kick it Apr 6, 2024 · A second factor that seems to be showing up in some Sniper 2 Wizard tunes is that the Acceleration Enrichment vs TPS RoC Blanking value is only set to 5. Slow acceleration is fine. my screen recording software i Holley Sniper EFI Training Part 18: Acceleration Enrichment breaks down how the accel enrichment fueling offset works within the Sniper programming. 1st, on light acceleration once it's warmed up (5-8% TPS) I get a slight stumble for a second, not terrible. This basic manual contains the information necessary for the installation of Save the new Config File, copy it to the SD card and then load that into the Sniper and give it a try. Holley Sniper EFI system | Tanks tank and in-tank pump Owned since 1985. Once you've done that take it for a drive. Page 25 of the install guide: 'Changes the “accelerator pump” function of the fuel injection. There are several tuning strategies when tuning Acceleration Enrichment (AE) that will end in a similar result. Apr 4, 2023 · How can I get a list of what all the settings are supposed to be? Holley says they don't have one and there's no way I can download it from my system. Joined Dec 2, 2007 · 1,365 Posts There is a setting for acceleration enrichment. This could be a combination of both acceleration enrichment and a part of the table where Learning hasn't really Learned correctly Was cruising the shallows of Facebook the other day, and there was a hot debate on whether you should make tuning changes based solely on the addition of the Holley 20-16 throttle lever extension on a Sniper EFI. Jun 14, 2020 · The EFI system should be in Closed Loop as soon as the WBO2 sensor completes its initial heat cycle at key-on. I'm starting to look at the Acceleration Enrichment. Acceleration Enrichment is like your squirters on a carb or accelerator discharge nozzles. Undid that. Installed the Sniper a few months ago on a freshly rebuilt (but already run-in) 383 stroker, and it's been running perfectly. 0, 9. If the Base Fuel Table is off, all the modifiers wil be as well. 1972 442 W-30 Tribute build I have no issue with the Acceleration Feb 12, 2019 · I would gradually push the engine up about 100 rpm increments at a time and hold for a few to let the sniper learn that rpm/map. Danny Cabral. basically staying in closed loop will just cause driveability issues because its going to Holley's Sniper EFI Super Sniper Stealth 650 is the best way to convert your carbureted engine to fuel injection with just 4 simple connections required. This basic manual contains the information necessary for the installation of Holley Sniper EFI Training training course starts with the basics of downloading and installing the Holley EFI software. Login or Sign Up Logging in Remember me Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. 3. '92 Ford Oct 25, 2022 · OK. Some symptoms i am getting are backfiring upon But I'm honestly at my wits end and cannot get the Sniper EFI to run right. ). Basemap Creation. 1/370, 7. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. hefi file). Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. The people I talked to on the other forums told me to mess with the IAC Hold settings. AE, can be utilized. I tried lowering the Acceleration Enrichment and lowering/raising RoC settings. dlz. S. "Holley" folder, "Sniper" folder, "Config Files" folder (. 3L SBF, Dart SHP 8. 0, 11. May 11, 2024 · Hi all. The Super Sniper Stealth ECU is capable of Hello all. 0, 6. Administrator. Below are some of my engine related specs. (Not to say a different Jun 18, 2018 · Originally Posted by Holley V2 EFI Software Update Overview (When Holley EFI began using a Volumetric Efficiency % Table. I'm running into an issue with this tune after swapping out new Sniper due to the last issue. 2 block, Eagle 3. I tried to read some of the old posts, but can't seem to have that "ah" moment when I understand. The QuadraJet with the spread-bore setup will likely have a lot different enrichment setup than the square-bore. 700R-4 ProBuilt, Moser 12-bolt with 3. If you have changed any Acceleration Enrichment values, they should be returned to the original value and should not be adjusted until the IAC Position is set properly. First of all, I have to mention the laptop is connected to the ECU via the USB cable. When I accelerate or even give it a little gas at an idle, the air fuel ratio goes very lean, but then bounces back to normal. Basic functions such as fuel, ignition and idle programming are covered as well as more advanced features such as closed-loop fuel control, rev limiters, fail-safe protection, boost control, nitrous, water / meth tuning and much more! Holley Sniper EFI 4150 Super Sniper 650 with HyperSpark Ignition. Mar 29, 2018 · What does the advanced acceleration enrichment graph adjustment do that the basic fuel acceleration enrichment doesn't? Thanks. com Aug 1, 2019 · My Holley sniper EFI is very responsive when it comes to taking off while racing but Not every time I'm at a stop. Dec 24, 2020 · Your TPS & MAP RoC Blanking values in Acceleration Enrichment are definitely set to 5 & 7 as suspected. Post Cancel took me a moment to get a smooth 2500 RPM so pardon my wavy TPS. This changes the Base Fuel Table units from pounds/hour of fuel to VE%. To start viewing messages, select the forum that you want to visit from the Jul 20, 2021 · Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. You can see the battery voltage Please be aware that this is a community forum. For now I'd disregard that and tune the idle at 14:1 in Open Loop around 800 RPM at 170°F or higher with the Learning turned off and the Learn Table cleared. 1 AFR on the idle side of the map and 13. For example, all the Acceleration Enrichment tables are present in the tuning section of the mobile app. I have:-Updated the Base Timing Table. I currently have the Holley in-tank fuel pump which is self-regulated for 60 psi. Join Date: Dec 2009; Posts: 36183; Share (EFI Acceleration Enrichment In Carburetion Terms) I see in the previous posts Danny suggested lowering these number down to around 5 or so, but this was for a Dominator unit I believe Would really appreciate the experts advice here. Nov 4, 2021 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. zip (205. I experienced some start & idle problems for a while, but after replacing my throttle position sensor, everything seems to be working as it should and it runs OK. First I read the AFR going too lean during acceleration. Sep 12, 2020 · Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and Didn't know whether to keep adjusting the Acceleration Enrichment or do it with Base Fuel Table. Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. '92 Ford Mustang GT Jun 27, 2022 · Sniper EFI Tuning & Tech. Nov 9, 2024 · The Holley Sniper EFI uses “Cranking Fuel” and “Afterstart Enrichment” settings to control fuel delivery during startup. I came across Chris Meyer's article on the progressive linkage and how to correct the Acceleration Enrichment table. Hello everyone, it's been a long time. For TPS based AE, the faster you open/close the throttle, the faster the TPS Aug 19, 2024 · Goes lean & stutters at low RPM acceleration. What I'm hearing, the above applies, in addition to meeting Target. Closed Holley Sniper EFI Training training course starts with the basics of downloading and installing the Holley EFI software. I've got my system 95% sorted out now, but I'm trying to figure out why my light to medium throttle acceleration is going rich. I'm not sure if GP mentioned it or not, but your X axis scaling does not match from the Base Fuel Table to the ignition Base Timing Table. 0 all the way to 23. I've had my Sniper on my 400 SBC for 3000 miles now and it's running great. Also I'm going to work on the power to the Sniper and I'm thinking about installing a +12V DC regulator that holds the voltage steady, just for the Sniper circuit. Numbers in my unit don't match what are in the instructions. jemruva lfcp okrj vcyg vhfjbu ytzeewa qsyhz kzlinx jhota tspfuheua