tcamaro98

iTrader: (2)

jus put prc 5.3l heads and a ms3 cam and i had texas speed do the tune and tune it a second time and it still wont idle right. when i rev it up and let off it wants to die. it used to throw p0106 but thats gone from the tune and it is running extremly rich. i also checked for vacuum leaks and cant find any. i replaced the map and the IAC. taking all suggestions.
i need help only have like three days of good driving weather left!!!!!

mvvette97

iTrader: (18)

for now you can turn up the idle screw to get a little more air. Just don't drill the blade like some people do.

tcamaro98

iTrader: (2)

i tried that and it jus made the rpms go up at idle and i still had the problem

mvvette97

iTrader: (18)

how long have you had it running? When I first got my cam in I had a mail order tune and it done the same thing. I had to just hold the throttle just enought to keep it running . I had to do that for almost 15 min. before it would idle by itself. It takes a while for the pcm to learn the idle

tcamaro98

iTrader: (2)

i had it running for a while and it will idle fine its jus when i rev and let off it is when i have the problem the rpms will drop down to like 400-500 and then jump back up

mvvette97

iTrader: (18)

oh ok. I know all about that myself. I had three differant mail order tunes and nobody could get the idle right. I finally bought tuning software and tuned the car for what it needed. The tune like you have is just a tune that should work for the mods you have but alot of time it doesn't work that way. Two cars with the same mods will require differant tune settings. You need to find a tuner or find somebody that have EFI Live or HP Tuners and have them do a tune for YOUR car. Like I said I farted around for almost a year tryin to get mail order tunes to work with no luck. Now my car never has an idle problem and even runs a hell of alot better.

PREDATOR-Z

When was the last time you cleaned your TB? Carbon build up can affect the way it idles (especialy in the idle sensor area).
Also look at rectifying your cracker tables, I cured that on mine that way.

tcamaro98

iTrader: (2)

i cleaned the throttle body the other day when i took it off and replaced the IAC

themack56

iTrader: (70)

i have the same prob, when it idles, it idles fine, but when i rev it, then let off it goes down to about 500 then jumps back up to normal idle, but my car isnt a h/c car, i just have longtubes and a fast 90 90, i had the car tuned, but that didnt change

tcamaro98

iTrader: (2)

how long have you been driving yours like that? any problems? i kind of scarred to take it out

PREDATOR-Z

a good tuner should fix that, tell him to woork on the throttle cracker tables (smooth out), I had Guitsboy help me on that annd it improved a lot back when I had a 232/234 cam