thanks but wouldn't be bank-2 precat 02 since the reading LTF reading is in the 3.8 compared to bank-1.?? i might just keep an eye on it for now until i put a few more mile for the computer to finish doing it's adaptation mode.
today i re-tighten the intake manifold screws they took an extra 3 turns each
and bank-1 is LFT=1.5 bank-2 LFT-3.1 once again thanks for the breakdown explanation.
Quote:
Originally Posted by bcredliner
Fuel mixture is controlled largely by the MAF and pre cat O2 sensor regardless of the altitude. However, when the altimeter and MAF readings do not match it can result in no adjustment to fuel mixture resulting in a variety of engine symptoms. The variation in air density and altitude on your A to B trip is well within min/max fuel mixture parameters of the MAF/pre cat O2 sensor and any mismatch between the altimeter and the MAF would not be significant enough to matter in your circumstances anyway.
I don't think the variation on bank 1 has anything to do with the MAF or the altimeter as the variation would be in both banks. I would troubleshoot the pre cat O2 sensor on bank 1 as the culprit.
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