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overall fuel trim problem.

Posted: Thu Apr 12, 2012 4:02 pm
by burmese434
Built 2.0 gsr turbo w/ RC 1200cc injectors. I'm having trouble getting the a/f fixed. It seems like the injectors dead times are way to high but I put in what rc told me. I tried using my lsvtec 1200cc tune and changing the dead times and still don't seem right.

So I tired a new map and putting in the injector size,map sensor,dead times. I have to put in like -50% overall fuel time to get the a/f 14.7-15.0? I've tuned other cars and never had that much overall fuel trim.

lmk what you guys think

10.0 11.0 12.0 13.0 14.0 15.0
2.55 2.28 2.00 1.76 1.62 1.46

Re: overall fuel trim problem.

Posted: Fri Apr 13, 2012 11:34 am
by Spunkster
What is the fuel pressure?

Re: overall fuel trim problem.

Posted: Fri Apr 13, 2012 11:46 am
by burmese434
42psi

Re: overall fuel trim problem.

Posted: Fri Apr 13, 2012 12:14 pm
by Spunkster
The dead times provided by RC are more than likely incorrect. Try much lower dead times and see if that helps.