SS Crewman playing up - rich fueling

[ChChCrewman]

Hi team,

I have an LS1 crewman and it is having one of those days. It is running rich on the right cylinder bank ( viewed from front looking back ). Pulled the plugs and left bank good, right bank sooty and black. It pops and farts when cold and clears when hot. Faulty O2 sensor?
Do these vehicles run separate fuelling systems per bank?

It has headers, K&N filter and a Harman Motors ( ChCh ) tune FYI.

Thanks in advance for your help

[andyman]

Hi team,

I have an LS1 crewman and it is having one of those days. It is running rich on the right cylinder bank ( viewed from front looking back ). Pulled the plugs and left bank good, right bank sooty and black. It pops and farts when cold and clears when hot. Faulty O2 sensor?
Do these vehicles run separate fuelling systems per bank?

It has headers, K&N filter and a Harman Motors ( ChCh ) tune FYI.

Thanks in advance for your help

are you in a position where you can testing oxy sensors operation with a scan tool or multimeter?

id also check the tune as the oxy sensors wont affect it in cold running as it will be in open loop mode

[ChChCrewman]

are you in a position where you can testing oxy sensors operation with a scan tool or multimeter?

id also check the tune as the oxy sensors wont affect it in cold running as it will be in open loop mode

Yes, I have a multimeter and know how to use it . Got a plan ?

[andyman]

with the ute at full operating temperature, back probe into the positive side of oxy sensor (not the best spot) but if the voltage is varying between say .2 and .9v at idle at operating temp thats pretty good to normal,

failing that get it on a scanner and see what your fueling is upto, something maybe a miss in the tune youve had done