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The owners wifes car had a both bank lean condition a few weeks ago, new fuel pump fixed that, I think. I don't know for sure because I didn't do the repair or confirm fuel trims after, but the light would come on within a day before and now it's been weeks. I do know that fuel pressure was a little low and trims got worse with rpm.
I also know that it has a new MAF, exhaust manifolds, plugs and wires.
Now, it's got ltft of 20 on bank 1 and 12 on bank 2. Stft are happy there at 0 at idle. With rpm, the 20 becomes 18 and the 12 becomes 8.
We smoke tested it today, for a while, found nothing at all. There is no brake booster on this model. I plugged the purge valve with no change in fuel trims. Did an injector Ballance test, all we're in spec. Plugged the pcv system and got maybe .5 psi.
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