Log these pids: GM.MFCYL#C where # = 1 to 8
( I don't remember if the cyl #'s correlate to actual cylinder numbers or to firing order )
Log these pids: GM.MFCYL#C where # = 1 to 8
( I don't remember if the cyl #'s correlate to actual cylinder numbers or to firing order )
Check:
- wiring connectors at each coil pack assembly;
- wiring connectors for injectors;
- wiring for CMP sensor.
Found the problem turned out to be coils but shortly after fitting them I did a big end as the engine was low on oil
Sorry guys I have had a busy week and some family issues. I found the problem and it was the coils it was running on all 8 but must have been a bad spark from multiple coils.