I need some help to figure out why my 07 HR suddenly started running really rough after replacing the W brace.
It sounds like it's not running on all cylinders and after checking with the OBD scanner I am amazed at what's going on with the fuel trimming, but not sure why. I've already changed the plugs, cleaned and swapped the MAF sensors, checked the heater resistance of all O2 sensors, but now thinking it's fuel / fuel starvation related? Maybe a result of jacking up with 1/4 of a tank of fuel?
Green and Red are B1 and B2 fuel trims, whilst Yellow and Blue are B1 and B2 pre cat o2 sensor voltages.