z28 mysterious cylinder 3 misfire
Hey everyone new to the forum! 97 z28 auto 100k
it throws cylinder 3 misfire code and runs rough/rich
I changed wires/spark plugs, distributer = much better but still throws code
tested compression and came back good.
To me it smells like its running rich and somewhat hesitates at times.
It doesn't look like any of my data is off either except o2 bank 2 sensor 1 would creep down to .120 V and shot up back .600 V while o2 bank 1 sensor 1 stayed at a pretty constant .415 V
at idle the MAP kPa is 38 and spark adv 27 degrees it was kinda cold and MAF of .02 lb/s (sorry for unconventional units)