cant get this thing to run right
cant get this thing to run right 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!!!!!
i need help only have like three days of good driving weather left!!!!!
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
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.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
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.
Also look at rectifying your cracker tables, I cured that on mine that way.
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TECH Fanatic
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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