Hello once again . can someone please guide me in the right direction please . my truck is old but it has ran great since I've owned it . it has 332000 miles on it . with saying that . I've had a p0601 çode on for a few months now . still runs great . until last week . all of a sudden just started running super rough and it won't stay running . how would I check the timing ? There is alot of weird noises from the lower end towards the rear . any help would be much appreciated ..

 

Just one thread please.