I turned the AFM off in EFI today and its running great and all codes are gone!
These are the part #'s I used to delete the AFM.
- 4.8 Cam Gm 12625437 (1)
- Lifter guides GM 12595365 (4)
- Lifter's GM 12499225 (16)
- Valley cover GM 12598832 (1)
- Head gasket GM 12589226 (2)
- Arp head bolts...