Tacticalwill
Junior Member
Started this on another forum with no replies at all. Long story short all 4 o2 sensors started throwing heater circuit high codes. Then the engine started stumbling and stalling. Here is the latest update. Any info helps thank you
Another updated. Ended up running new wire from pcm to truck side connector for o2 sensors. Still stumbled and misfired a bit. Replaced one upstream o2 sensors with ntk 23159 and seemed to fix bank 2 fuel trim (was pulling -33%) truck ran fine with just that. Decided to replace bank one upstream with same part number. Kinda ran weird the first drive cycle. Bank 1 seemed to be intermittent getting weird voltages code p0300 again. Second drive cycle went a bit better just stumbled one time and didnt seem to misfire. Not sure whats going on anymore. Checked and cleaned ground g107 at pass side inner fender. Checked cleaned pcm ground by battery neg. Ground strap on back of passenger side head looked in place and measured 0.25v drop while cranking and 0.05v drop running off of ac mounting bolt on the engine. Only thing i can think to start looking at now is the pcm.
Another updated. Ended up running new wire from pcm to truck side connector for o2 sensors. Still stumbled and misfired a bit. Replaced one upstream o2 sensors with ntk 23159 and seemed to fix bank 2 fuel trim (was pulling -33%) truck ran fine with just that. Decided to replace bank one upstream with same part number. Kinda ran weird the first drive cycle. Bank 1 seemed to be intermittent getting weird voltages code p0300 again. Second drive cycle went a bit better just stumbled one time and didnt seem to misfire. Not sure whats going on anymore. Checked and cleaned ground g107 at pass side inner fender. Checked cleaned pcm ground by battery neg. Ground strap on back of passenger side head looked in place and measured 0.25v drop while cranking and 0.05v drop running off of ac mounting bolt on the engine. Only thing i can think to start looking at now is the pcm.
