Need some help with a lean condition

[rawavr4]

Car is a bpu 92 vr4. Mods are Intake, turbo back exhaust, fmic, fuelab fpr, hotwired walbro, Wb02, forge bov, ngk copper plugs, new wires, new o2 sensores, stock turbos.

I just had the car at GZP for my 120k service, which they did an excellent job doing and I had it back in 2 days. I have massive oil pressure now. But the problem is ever since I got the car back, its been running much leaner than before. I'm 99% sure the problem is unrelated to the work they did, and just a coincidence it happened now. The car went in with an idle afr fluctuating from 14.3-15v and cruise from 14.5-15.5v exact. When i got it back idle was at 15.1-16.3v and cruise is at 14.4-16.8v sometimes hitting 17:1. Also on hot starts, O2s trims will rise up in the 130 range for a few minutes, then drop down to normal. Hans and I both checked for vacuum leaks and there are none. Fuel pressure is at 43-44psi base pressure. Hans told me both o2s are cycling. Any help would be appreciated.

[vr3.9]

what do your fuel trims look like?

[rawavr4]

Low. Last time i drove it they were all at 81. They've been like that since i got my scanmaster lol

[x2xtreme360]

81 is rich, not lean.

How are the short term trims? Is 81 the LT or ST? if the short terms are within 10 points of 100, the ECU is most likely adjusting to the loss in information when the battery was disconnected.

[rawavr4]

I'm using the scanmaster and it shows all 3 fuel trims at 81. I know 81 is rich but my wideband shows lean and I get tons of knock. Even when my wideband was showing perfect afrs before the service, my trims were still low. They've always been that way. And I've been driving the car for a few weeks and thats plenty of time for the ecu to relearn.

[vr3.9]

That's interesting last night I tried to help a car with the exact opposite problem. Fuel trims were all 141 and the car ran pig rich. Sometimes things just don't make sense till you have enough sense for them to make sense to. I need some more sense. Not the ECU on that one swapped it and did the same thing.

[Hans@GZP]

You can cruise in the car and literally watch the wideband cycle from 14.5 to 17... it's quick... nothing slow about the cycling. And the car still seems to drive fine. It will idle really lean and still seem like it's idling fine.

This is with stock injectors and ecu... no fuel controller in the mix.

[rawavr4]

Hans can you recalibrate the wb, just in case the sensor got messed up while it was out. The directions for it are on google. If you don't mind doing it while its there. That'll at least take the wb out of the equation as a being the problem.

[Emilie@GZP]

What brand wideband is it? Innovative?

[rawavr4]

Yea innovate lc-1.