04 GTO problems
11-30-2016, 07:04 PM
#1
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04 GTO problems OK, I've read alot of different post on here as a guest, before signing on, I have a '04 A4 that I bought sight unseen on the internet, good price, but not as I thought. It had long tubes, no cats, SLP loudmouth, K&N CAI, no tune, melted O2 wires. I removed the longtubes, replaced with JBA shorties, JBA high flow cats, left the SLP anf K&N, did wires, plugs, O2's,Intake gaskets, smoked intake, no leaks, fuel pressure 58 psi at idle, driving car at 55-65 lt fuel trims are @18, around 80 lt fuel trims are @8, stft are varing between +3, -3, randomly throws P0171,P0174 codes, tried different MAF, no change. I had to put in O2 sensor spacers in the rear sensors to get it barely thru inspection (voltage @.120), engine light came on during exit, Also traction control randomly turns itself off, usually after a long decell, Does it need a tune? Or what to look at next?
12-01-2016, 02:34 PM
#2
When you say fuel trims, do you mean afr reading from the wideband? You should probably turn off the rear o2's with the high flow cats. Sounds like you need a good tuner to tune it up. If you are saying that the wideband is reading 18 at 60mph, that is really lean. 8 is really rich.
