Vehicle had random misfire that increased in severity as vehicle got closer and closer to operating temperature. We removed the ignition coils to visually inspect. Three coils looked like they were leaking high voltage, the coils had white burning tracing on them. We replaced the coils and the spark plugs. The misfire was still the same. Then I saw the CKP sensor data on the MaxFlex Scan tool and found the CrankShaft Position sensor was dropping out the hotter it got. Well, the brand new acdelco sensor fixed it.
