The car is a Trans Am with Vortech s/c kit. Stock cam and everything. Just headers and the kit with some FIC 80# injectors. The car was brought to me originally with Deka 60's that I blamed at the time for the strange problem. I sent the injectors to John at FIC at he said they were rusty and basically a huge mess. So I threw on some fresh 80's with FIC's data, and still... same problem.
The Problem: Idle is rich rich rich.
I have 2 widebands on the car and both show in the neighborhood of 10.5-11:1 a/f at idle till the fuel trims kick in and remove 35-40% of the fuel. As soon as I get out of trim cells 20 and 22 everything goes back to hunky dorey. I have tried everything in my mental capacity to fix this problem, to no avail. Last time was when it had the Deka 60's, now this time with the FIC 80's. 2 sets of injectors, same set of problems. I don't think it's injector data related because both times I have used what has been presented to me by John at FIC, as correct data. And I use FIC injectors/data all the time and have never had this problem.
I have leaned out all the start up enrichment to no avail. Nothing I do fixes the problem, that's why you will even see the VE multiplier table all wacked out because I literally have tried everything to fix this issue. I even put a value of 1 in the VE between 0-1200 rpm and 0-40 kpa. Only thing that did was made the car sound like it had a cam as the computer went from rich to lean rich to lean.
I've put solid values in the MAF, set it to 1, with the VE at 1, it was the best in regards to fuel trims when I did that, but I can't leave a stock cam car sounding like a dragster
Soooooo, I really have no idea and have never had a car do this before. This is very weird and it's going to take some real digging to figure out. I've done write entires with completely new files to see if that would fix it, but no matter what I do, still same problem.
Here's a short log as well as the current clusterfuck tune. Compare it to a stock 02 A4 to see what i've attempted to do that hasn't worked.
v1.hptRich idle lean cruising.hpl