WebAug 8, 2024 · Short answer is that a variable PCV valve confuses the IAC. The IAC is constantly trying to compensate for the changing volume of air the variable PCV is … WebApr 22, 2024 · Your Sniper is rarely in Closed Loop, so that's one clue. When it's in Closed Loop sometimes it's up against the rails using 50% for both Closed Loop & Learn. I think you have a fuel delivery issue. Could be a clogged fuel filter, a bad pump, a poor connection on an injector, or something along those lines. It appears to be intermittent. gostephen
Holley Sniper Tip, Tricks, Pros, Cons, Advice - Full Size Jeep Network
WebNov 30, 2024 · Looks like you're going for a factory resto look. If so, you'll need to modify the factory PCV valve so it's a fixed orifice type. Do not run a factory PCV valve with the Sniper. It can stick open and cause a hung throttle condition. You should be able to take a factory PCV apart, and then run a small tube through it and pot it with RTV. WebMay 29, 2024 · Threw on the fixed orifice valve, didn't help. It's like the unit doesn't understand it needs to idle. It just sits there and lets itself nearly die then remembers to open the IAC and stay running. Just does it over & over again. One interesting thing is, it'll do this even if it doesn't start to die. thal montagen
Fixed Orifice PCV System - Toyota Engine Control …
WebJan 9, 2024 · A simple list of problems in no particular order: 1) If the cold engine CTS value is 10 or more degrees higher than the MAT the CTS sensor is bad and the engine will not get correct temperature enrichment. Replace the CTS if it reads high. 2) Verify fuel pressure at the Sniper with a pressure gauge. WebMar 10, 2024 · 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? Vacuum leaks? Check for ignition misfires/RPM signal problems? Wiring issues ? Fixed orifice PCV valve ? Exhaust leak upstream of WBO2 sensor, or if the WBO2 sensor (or other sensor) has failed and … WebDec 17, 2024 · The answer is to convert over to a fixed orifice PCV valve. You can buy fixed orifice PCV valves for Chevy engines but you have to make your own for a Mopar. ... Purchased a Holley Sniper EFI for my GTX. I've been having a weird lean pop at mid-low rpm that I just cannot tune out on my Edelbrock AVS carb. Said "F' it and bought it. thalmor boots glitch