Holley Sniper Rough Idle, Idle drops down and almost stalls (sometimes does stall), then surges up to 3K RPM, then drops back down. Here's a video: For the record I have setup the EFI to control the … I did some searches but couldn't find what I was looking for. with a properly set ignition and idle circuit your transfer slot … Rough idle, and poor AFR will result if one injector goes down - and probably due only to a loose or dislodged cable connector. 0 HO (1990) and it … Good morning. 0 AFR, so I lowered Learn and Closed Loop Limits to ±5% in this area. It only happens above 1800ish RPM. Closed Loop is on, Learn is on, the CL Comp numbers are low and the Learn Table … Why are you using the secondary curcuit to control idle?? set them back to closed and properly adjust per holley specs. It's a progressive linkage and a … The Sniper tends to not like lower idle speeds so you may want to set the target idle speed at 750 and then adjust the idle stop to get the IAC set. 2% (the IAC value is 40% aka 4% increase is blade %) When I barely touch the pedal and move it 1% the IAC goes to 0 which … My idle I feel was tuned pretty well at 14. I have the Holley HyperSpark, just getting the fuel side right before I add another variable. I figured I would reach out here to this forum for ideas while waiting more feedback from Holley Tech Support. Over the past week or so our Mk4 has had a long crank time. I found that many people had similar issues and the pressure regulator in the Holley Sniper isn't great and can fail. How it idled at 500RPM the first time I fired her back up, I have no idea. I've wrapped the secondaries spring with another wrap, I've replaced the throttle cable and added and extra return … Hey guys. Although, it will idle very low (500 … Holley Sniper How to Set The IAC Idle air Control in 5 minutes or less. Holley Sniper EFI is a perfect … CD Box Ignition (no timing control) setups must have the Tach Output Wire from CD box connected to the purple wire (Crank Signal Positive) in the Sniper EFI Harness, using the provided … For your engine setup you need more timing at idle - likely 20° to 22° rather than the 12. Since the install, the car hasn't run well. I'm relatively new to Sniper installations and this is my first larger HP Sniper … I've been slowly approaching what I think is a good idle. Just took it for a spin and when idle the AFR reads 9. Just replaced the engine and transmission. It seems to be lean surging or something, it idles very high and comes back down to a very low idle. I've been having an issue with the Sniper 2 EFI since I installed it, hoping someone can help me. Start the engine and collect a datalog for about 15 seconds. I have a Sniper powered 427W. In summary: 1. I’ve cleaned the floats and tried adjusting them and the mixture screws. 5° currently commanded. I'm a 20 year … If you are using your Sniper EFI System to control timing, navigate to Tuning > Advanced > Advanced Idle > Idle Spark and ensure that the Idle Spark Enabled is set to Disabled. Probably more base … The idle has to be set properly before attempting any other corrections. To thoroughly clean injectors, they need to be back flushed … To start viewing messages, select the forum that you want to visit from the selection below. OK, so I've had the Sniper on my car for less than a year, and it seems I've had to mess with the IAC so many times, to the point that I stopped messing with it. … Holley Sniper EFI systems - Troubleshooting help page kiwigtx Aug 12, 2023 1 2 Next Sniper EFI Tuning & TechKeep this in mind, I'm speculating here: I believe there's a unique situation with the Sniper throttle body in the manner it delivers fuel and there's a tipping point … Hey everyone, I’m currently dealing with a lean tip-in issue. Hi All: Last year I bought a heavily modified Porsche 914 with twin turbos, running a Holley Super Sniper. ECU and 3. I found that many people had similar issues and … Chasing a lean AFR spike and off-idle stumble/stalling on a BBC with Super Sniper and manual transmission. Anything below that and it's … This video shows you how to set the initial startup idle or if you want to reset your Holley Sniper EFI and reset the idle as well. Also installed hyperspark ignition. Had external shutoff wired in, but have since bypassed it to try and narrow down the problem. Glad to be here. Raced and hot-rodded Holley carburetors for many years. I finished my Factory Five Roadster about a year ago. After some research I replaced the o2 sensor. Thanks! Also, no timing control by Sniper at this time, just HEI, no 6A box, etc. I have 396 with a Holley 4150 750 that I continously run into problems with gas leaking inside one of the corners from my understanding is a result of the float's getting stuck? Anyhow, I … Said I'd do a review on the Holley Sniper, so here it is. I've been trying to find the problem for a year and haven't made any … 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 … The current AFR table is auto generated by the sniper with idle at 13.
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