Backstory.......
This entire setup was in another car. Top to bottom. Customer wrecked his car. Still ran fine. We took the setup and put it in his new car. Same tune, same fuel system, same turbo kit. Brand new OEM wideband sensors, brand new spark plugs.
ID1700. Fuel pressure set with car off, pumps on, 55 PSI. All injector data entered correctly.
The issue:
Everything works properly in regards to MAF and stft/ltft while driving. As soon as you stop, stft goes to zero and widebands read way rich .73-.79. Start moving again they come back online fuel trims back to normal. Threshold seems to be roughly 2-3mph or over 1200rpm.
Also noticed and I will attach a log. If I let it idle AC off, eventually fuel trims will ZER0 out, and it will read way rich on the widebands. As soon as you turn the AC on, the stft comes back on and the widebands start reading where they should be matching commanded 1.0.
Post this one.hpl
Fuel trims are off in attached log. STFT have been within 1-2% throught the maf transfer while driving though previously. I have been playing with different fuel pressures, idle speeds, adding and subtracting from maf. Absolutely nothing has helped this issue which happens only at idle, this issue did not exist on previous car or my car which pretty much has the same tune (same setup)