Whats up folks.
A buddy of mine has a 2009 G8 GT. The car has a Vararam, Fast 102, SLP headers, high-flow cats, full exhaust and a 3600 stall. The rest is stock.
The car is pinging its butt off. He has a tune that was mailed to him and he uploaded it with HPT. I looked in the tune and his tune is only commanding 23 degrees of timing. I looked at his PE and it was super lean (1.01 in upper rpms).
Here is what I have tried...
I set PE for 1.17 across the board. It reduced the KR but theres still slight KR. I ran PE as fat as 1.28 with no luck. I dont currently have a copy of the tune but I did do some logging. I can upload later...
I reduced the WOT timing to 17 (from 23, to 20 and then 17...). Still has KR
The previous tuner put the car in strictly MAF mode. I performed a MAF tune on the car because the STFT were above 10%. I got them under 3%. That helped a wee bit but still...
Also, the owner has Iridium plugs installed. I believe they are stock heat range. I think these plugs may be a contributing factor. I recommended that he order a set of NGK TR6's so that we can eliminate plugs as possible suspects.
I will post the tune and log (I cant remember if I saved it...) but in the meantime, can anyone offer any advice?
Thanks!