Phil99vette

iTrader: (11)

I was idle tuning monday and saw something very weird. When I started the car up after a tune, I reset the fuel trims. Within minutes the fuel trim was doing some crazy things, the LTFT B1 was 0 - (-1) while the LFTF B2 started @ 0, moved to +5 than to +10, +15, +25 and the car starts to idle rough. Would a bad O2 cause the car to dump fuel?
Phil

MeentSS02

iTrader: (11)

Possibly, but it almost sounds like a fuel delivery problem on the one bank...

HumpinSS

iTrader: (1)

or some leak at the headers or somewhere before the o2 sensor on that side. Swap the sensors and see if the problem follows to the other bank. If it does its the o2 if you see the same thing happen on the same bank then you may have a leak somewhere

bmfcamaro

iTrader: (1)

use the chart dispaly and log the o2 b1 and b2. look at the graph and it will tell you if they are working or not. they should be real jumpy.