This is a discussion on CEL Help within the Computer & Tuning forums, part of the LSx Technical Help Section category; Ok, I have a 2004 GTO with the following mods: D1SC Procharger (8lbs of boost) Intercooled Kooks 1 7/8" Long ...
10-11-2008, 11:54 PM #1
- Join Date
- Aug 2008
- Killeen, Texas
Ok, I have a 2004 GTO with the following mods:
D1SC Procharger (8lbs of boost) Intercooled
Kooks 1 7/8" Long Tube Headers (No Cats)
NGK TR-6 plugs (Gapped @ .035)
Stock Ported TB (From the guy on Ebay with the girl with BIG TITS that models it) No epoxy, stock blade hole.
Catch can, filtered oil cap, 1 filter on each valve cover PCV fittings
Ok, the rest of the car is stock. I have had the car tuned with HP tuners. The car was tuned on the street, not a dyno. I have a wideband gauge in the car to monitor my AF ratio.
I have been getting the P0171, P0174 and an occasional P0101 code. I have researched the codes so I know what they mean, so please lets not got there.
I have checked and rechecked all my procharger tubing. I am not loosing boost. I have sprayed all my intake runners, vacuum lines and fittings with carb cleaner and nothing changes.
I have checked every exhaust component for leaks and replaced both front O2 Sensors (Rears are deleted)
I have a code reader that does a freeze frame of data and it shows my LTFT on B1 & B2 to be @ +25 at an idle of 630rpms when the code is set.
I am going to go back to the tuner next week. What should I be looking for them to change to correct this problem? I am thinking my MAF tables are off and I am pushing too much air from what I have read doing my searches.
Does this sound plausible? Anything else I should check? BTW my car is really rich at 10.2:1 @ WOT so I know it is not a lean condition that I need to worry about, but I would like to fix this problem.
Thanks for the help in Advance.
10-27-2008, 05:38 PM #2
he should log the MAF and then correct at those cells affecting idle trims. it's what i've done to cars. you are maxing out the trims at +25%.
10-28-2008, 09:22 AM #3
if I were doing a FI car I'd look at getting a speed density tune and getting rid of the maf altogether.
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