Diagnosing engine problems with Data Master
Thread Starter
Burning Brakes
Joined: Jan 2002
Posts: 1,228
Likes: 1
From: Dallas Texas
Diagnosing engine problems with Data Master
I have been trying to track down some issues with my 95 for the past few days, trouble is I am not really sure what I am looking at!
First, to get a base line, I drove to work on my current calibration from pcmforless and I was running super rich. Right and left long term fuel trims were at 108, however short term was right around 122-128 with a heavy gasoline smell.
So I go back to the hypertech tune I had before this, and the long term trims are back in the 120's, but it barely idles and still smells rich as hell. It does not sound like loping from a larger cam, it just sounds like an engine that wants to die.
I have a feeling something is wrong, but I need to find out what things I should be looking at, like IAC position, MAP, etc... Is there an internet resource that gives good diagnostic or tuning advise?
[Modified by ninetyfivevette, 7:27 AM 11/6/2003]
First, to get a base line, I drove to work on my current calibration from pcmforless and I was running super rich. Right and left long term fuel trims were at 108, however short term was right around 122-128 with a heavy gasoline smell.
So I go back to the hypertech tune I had before this, and the long term trims are back in the 120's, but it barely idles and still smells rich as hell. It does not sound like loping from a larger cam, it just sounds like an engine that wants to die.
I have a feeling something is wrong, but I need to find out what things I should be looking at, like IAC position, MAP, etc... Is there an internet resource that gives good diagnostic or tuning advise?
[Modified by ninetyfivevette, 7:27 AM 11/6/2003]
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: Diagnosing engine problems with Data Master (Skippy Stone)
i'm having a similar problem with my PCMFORLESS chip... I'm not getting alot of support from them either.. I hope these guys come through for me.. :yesnod:
Melting Slicks
Joined: May 2001
Posts: 2,159
Likes: 64
From: Nichols Florida
Re: Diagnosing engine problems with Data Master (ninetyfivevette)
Have you checked the injectors for leaking? IE Put a guage on it and see if it holds pressure after turning the car off. Good spark on all cyl? Compression?
Tyler
Tyler
