Hey Scotty this shows up on the scanner for my 02 blazer. Most all sensors have been replaced, plugs are new and wires are a year old and distributor is new. I didnt see any arking from wires but i can see the electrcity flowing through them at night. What could cause the misfires and do you think catalytic converter is needing replacing? 174,000 miles 4.3 vortec

No. 1-1


you should see nothing at night, change the wires first and pray it's not the vortec injection system plastic parts all cracking and breaking down