Holley sniper efi starting problems Nov 9, 2024 · Switching to a Holley Sniper EFI system can transform your vehicle’s performance, but starting problems can be annoying. Turn key on, Fan #1 is running, crank engine, 3. I went Good morning. I'm new to the EFI platform. I can manually make the coil fire by grounding out the white points wire from the ignition box, but the coil does not fire while cranking. I have a Holley Sniper EFI Jan 2, 2018 · Is the Sniper EFI Learning? Is the ignition timing synchronized? Is the fuel pressure 58-60 psi ()?IAC Position of about 5% at hot idle? Check for ignition misfires/RPM signal problems, exhaust leak upstream of WBO2 sensor, Sep 27, 2020 · The Sniper EFI was installed ~18 months ago, then about 6 months ago I swapped out an old MSD Pro Billet distributor & 6AL box (Causing misses, backfires, etc. Aug 12, 2023 · Trouble is, all that does is make for a richer mixture than the engine can handle, and start causing other problems like plug fouling, O2 sensor fouling, back-firing, hard starting, rough idle etc. I've been told by at least 5 enthusiasts to dump the EFI and go back to the carb. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Jun 15, 2022 · Sniper EFI Tuning & Tech. I installed a Holley EFI 18 months ago and until then everything was working fine. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FTI Comp Ported intake Dec 13, 2016 · IntroductionOk, we have enough Sniper systems out there that I thought it would be a good idea to create a posting on challenges that might arise during installation. My engine is the 572 ci crate from Ford Performance, I'll attach the build sheet if cam specs & such are helpful. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Sniper EFI Tuning & Tech. By identifying common issues and solutions, you can troubleshoot efficiently and enjoy the full benefits of modern fuel injection. Sep 1, 2023 · Sniper 1 has other known issues, so they even tried borrowing another throttle body that's known to work and the same problem persists. Mar 18, 2019 · Fuel Prime Enable F uel prime is an option that is enabled by default in all of the base calibrations. I suggest completely removing the Holley EFI software from the "Control Panel", "My Documents" (Holley folder) and the "C:Drive" (Program Files, Holley folder) and install a fresh EFI Sniper EFI Tuning & Tech. I apologize for the translation, but I don't speak English. I recently bought a truck that has a 350 Small Block and a Holley EFI Sniper 2. 470" forged steel crankshaft & H-beam rods, Wiseco 4. After it starts the idle slowly declines and I have to pump gas again. Mar 10, 2023 · Hello everyone. 5 " touch screen to power up), wetting the intake and allowing the engine to start much quicker. Jul 23, 2024 · Dealing with issues in your Holley Sniper EFI can be frustrating, but you’re not alone. The A/F ratio starts to go past 20 and the truck lays down on itself. You could also run a compression check and look for clues there. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration . Mar 8, 2020 · Sniper EFI Tuning & Tech. The broad consensus has been that the Sniper is an amazingly straight-forward install and starts and tunes as expected. Then yesterday I went to start the car after sitting for a week and it would barely idle ~500-600 RPM. The fuel prime functio n injects a small shot of fuel into the intake manifold 2. Mar 3, 2024 · A problem has started with after around five minutes of driving. My AFR is doing anything and I'm desperate because in France no one knows how to answer me. This guide will help you troubleshoot and fix these problems, getting your system back on track. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm May 17, 2022 · Hello, new (I mean GREEN) to fuel injection. Sniper EFI Problems 03-07-2020, 10:22 Aug 4, 2012 · • EFI Software Problems: Often times, when EFI software related functions don't work properly, it's caused by a corrupted software download/installation. I find the most helpful datalog function, is overlaying the datalog on your Config File. Cold startup 40°F it struggles to run. 2L engine. 3L SBF, Dart SHP 8. 5 and never changes until it's warmed up. Jul 21, 2021 · A quick down & dirty way to test if it's a fuel deliver problem (to rule in or out the Sniper), disable the fuel pump, crank the engine and use a starting aid to see if it'll fire and run off of the starting aid. Starts cold and runs great even when hot. Dec 7, 2021 · Sniper EFI Tuning & Tech. Let engine cool (Fan #1 is off), engine starts fine. For example when I get gas or do a quick store run. If it will not, you most likely have a mechanical timing issue. May God's grace bless you in the Lord Jesus Christ. I started a datalog before cranking engine, but Jan 20, 2020 · If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! Subscribe now to make sure you don'. I'm using the plug & play harness as well for ease of installation. Nov 3, 2022 · I've verified that I have run/cranking power to the Sniper EFI, distributor, and the ignition CDI box/coil. Nov 3, 2020 · I've got the Sniper running great when it's warmed up but. '92 Ford Mustang GT: 385"/6. It's 1978 Nov 9, 2024 · Switching to a Holley Sniper EFI system can transform your vehicle’s performance, but starting problems can be annoying. After several pumps of gas the car seems to settle down and idle. Could someone look at my Aug 6, 2024 · I'll try to describe the conditions: After drive, Fan #1 is on (set to come on at 196°F), shut engine off. I did a startup datalog and for the first couple of seconds the AFR is 12. Warm/hot start problem. The IAC & TPS will settle at Apr 25, 2023 · Sniper EFI Replacement Sensors - Auto Parts Store CTS Sensor: Standard Motor Products TX3 TPS Sensor: Standard Motor Products TH191 IAC Motor: Standard Motor Products AC416 WBO2 Sensor: Bosch 17025, 0258017025 (LINK/LINK/LINK) (The Sniper EFI 2 bar MAP sensor is internal with the ECU. Across the Oct 18, 2021 · May God's grace bless you in the Lord Jesus Christ. 5 seconds after the ignition is turned on (which is also the amount of time it takes the 3. ) with the Sniper HyperSpark CD box & Distributor and it's been running great. Ever since I got the truck it has had a really bad surging issue at idle. This is a great time to visually inspect the overall Sniper EFI install. To start viewing messages, select the forum that you want to visit from the selection below. If your EFI is causing headaches, don’t worry. This always happens after I drive for a little while - shut off the engine and turn on the engine within a few minutes. Just put Holley Sniper on our car and instantly having issues. 1, but as soon as the IAC increases to 100% to try achieve 950 the AFR goes lean to 14. Jan 20, 2020 · If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! Subscribe now to make sure you don' Mar 18, 2019 · I know the temp is around 180-190 when it gives me a problem to start. once it's restarted it drives as should, until a few minutes later the same problem appears. When I start the truck the RPM will shoot up to +2000 and then start to bounce from 1500-2200 RPM. The Sniper has been on this truck for around two years and this problem has just begun. I've installed s Sniper XFlow (model #540-440) along with the HyperSpark system (CDI box, distributor & coil). May 23, 2022 · Unless you've already spent money on a new sending unit in the tank. 05-14-2022, 05:29 PM. I'm really starting to regret this "upgrade" to EFI. Aug 17, 2020 · Sniper EFI Tuning & Tech. 5" TSLCD display goes blank, engine cranks, but does not start. Holley says they re-designed Sniper 2 from the ground up. The pump that came with my system from holley puts out 60 and is of course regulated in the efi. Jun 14, 2020 · 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) & Base Timing Table (optimize ignition timing). We need a datalog to be sure, but there are a few things you can try. Anyone who experiences any two of those mentioned previously should take note and do something about the problem before driving any further. Unfortunately this was my predicament a year ago. 2 block, Eagle 3. First, the Basic I/O under the System Parameters seems to cause problems when engine/Sniper temperatures are high. Many users face common problems like fuel delivery, ignition troubles, and air/fuel mixture issues. Holley HP EFI Stealth Ram system. Holleys sniper for that looks like it needs 58-60 psi, and those strokers say 55-60. Sniper EFI Problems 11-09-2021, 03:51 PM. Jan 20, 2020 · If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! Jul 28, 2017 · Before starting the engine, double check for leaks, proper wire routing, any wiring hazards or loose nuts and bolts. I own a 1970 Dodge Challenger with a 440 7. Jun 8, 2024 · Good afternoon. Nov 9, 2021 · To start viewing messages, select the forum that you want to visit from the selection below. After warming car (haven't worked on cold starting yet) can't get car to start without pumping gas. oeobpnjpbtbwktdeskrhhvtequsedtcetizptaovzmifkrdv