Lean condition

[04ls1gto]

Commanded 11.19 and measured 14.2. 5 degrees KR and 49% (?!?!) injector duty.

Could this be a fuel pump issue? Need to diagnose and fix this. I'd rather not have to buy a replacement engine. ANY help would be greatly appreciated.

[mecanicman]

need tune and actual log file to help at all.

[04ls1gto]

Tune and log attached.

[mecanicman]

I would check your pressure, but I dont think you have your maf and ve dialed in right yet.

[mecanicman]

part of your problem is you have not failed your maf properly in your current tuning. P0101 p0102 po103 must be set to 0 Mil on first error. I also like to go in a 0 out the maf table while I am doing this also. Your temps are high enough in this log to not be affected, but your open loop eq ratio table should be all 1.00 while tuning also.

[mecanicman]

If you look at your ve table is the same value from 5600 rpm up at 105 kpa, and lower then the 5200 rpm down values. This is likely what is leaning you out. Fully disable maf, set up a histogram to moniter, take some timing out, and fill in the higher rpm values.

[04ls1gto]

Thanks for the feedback mechanicman.

If anyone else has comments on the tune, I'm all ears. In the last week of logging, the car has not seen AFRs<12 regardless of PE EQ. The day before this log, an inadvertent overrev to 6800 occurred and the IAT sensor had failed.