recliner15

iTrader: (1)

I am having an odd issue with my o2 sensor readings and am having a tough time wrapping my head around it. Maybe someone can help

I just finished my swap and got it running and have been driving it around quite a bit

5.3 LM4 swap w/ LS1 accessories+intake
T56
6106 ECU flashed by LSXpower
Using the LM4 harness dissected by me

I am using one of the bluetooth obd2 phone app things for O2 volt info and fuel trim info

I am monitoring O2 Volt & fuel trim bank 1 sensor 1 and bank 2 sensor 1
The odd thing that happens is that anytime I get on the gas one sensor will quickly climb to either 0.9-1V or 0-0.1V and the other will climb in the opposite direction. This causes one sensor to trim -34 and the other +54 (assuming these are max values) and obviously the car runs terribly.

Any ideas on what could be causing this?

recliner15

iTrader: (1)

pdsq98gt

Bank 1&2 injector harnesses swapped. Or bank 1&2 O2 sensors swapped.

Mike_hawk

I second that opinion, I had my wiring flip flopped and had the same symptoms. It was easier to swap pins at the PCM than reroute the wiring, just make sure you move all the pins and not just the signal wire pins.

recliner15

iTrader: (1)

Spot on. Thanks fellas