GMC Troubleshooting Questions? Ask a Mechanic for Answers
can you monitor missfire counts on your scan tool?
on which cylinders?
you cannot monitor missfire counts on each cylinder with the scan tool?
what scan tool are you using? i understand what a random missfire means...po300 means more then 1 cylinder...you said you had thousands of miss fire counts...most good scan tools you can monitor each cylinder with a miss fire count... im not talking codes actual live data are you familiar??