dohc_y2ksi

Well im going on 900miles with the JRSC on and no problems so far but one minor issue with the idle...not a big deal..just kind of annoying.. It seems to be idleing around 1700 with the small occassional backfire..i think they are backfires more or less a small burp from the exhaust. I thought there might be a vacumn leak..checked and double checked that..i even used a leak detector..i got nothing Sometimes ill be cruisin and it will really act like a vacumn leak like soon as u let off the gas it boggs down until u put ur foot on the gas again, nothing changes on my gauge (vac/boost) when that happens and if u turn the key off then back on it fixes that..but that only happened like 4 times within the 900miles...not sure if they are related...just looking for advice thanks guys

dohc_y2ksi

bump for help!

sc4dr

does your rpm surge from like 500 to 1700 rpm repeatedly? that would most likely be a vacumn leak or fast idle valve. Have you checked your IAC valve? Have you changed anything on your car since you added the blower?

dohc_y2ksi

No is doesnt..it will stay at 1700 and slowly it will drop to 15 maybe or sumtimes it will rise to 2 and back down to 17...but not back and forth

dohc_y2ksi

bump bump bump

sc4dr

I know it might sound basic, but have you checked your throttle cable, and idle screw on your throttle body?

dohc_y2ksi

uhm not yet ill go do that now but that doesnt explain the small backfires the happen during idle, like at a stop u can feel them, and the engine kinda vibrates when it happens

LST2

What is your setup? Do you have larger injectors? Larger injectors like to idle a little rich. My car has lean misfires (like what you are having) @ 14.7AFR with 750cc injetors. It seems to like to idle around 13.7AFR. Also, larger injectors need a little higher idle say 1K RPM.

dohc_y2ksi

i fixed it now...but i have a temporary FMU with stock injectors..it seems to be idling at 1k now..still some back fires...ilde i think is lean..its at 14.7 perfect and with full boost its at 12-12.5