Here is my question. Is there always a differnts between bank #1 and bank #2 on the long fuel trims? See my attached log file.
LS1B_0036.efi
Here is my question. Is there always a differnts between bank #1 and bank #2 on the long fuel trims? See my attached log file.
LS1B_0036.efi
2006 Trailblazer SS
Twin Turbo 67 Chevy Truck
SOLD Truck 2002 Chevy kb turbo t70 5.7l
no, not always. your bank 2 seems consistantly higher than your bank 1, but not excessively. it may indicate you're running slightly leaner on that bank (i.e. injectors have a tolerance no matter what, you may just have a few injectors on bank 2 that flow a small less than the ones on bank 1, you could switch the injector placements bank1 to bank 2 and see if the trend follows them if you really wanted to. it could also be a sign of a small exhaust leak (or even an intake leak, but I think thats probably less likely IMO). it could even be variations in the O2 sensors themselves, you could try swapping the o2 sensors bank to bank and see if the trend follows them, if you wanted.
1996 c1500 gen1e 5.7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. coming soon: Twin Turbos