most likely not MAF related or it would throw 174 and 175 for both banks....I wouldn't completely rule it out but usually both banks will be effected with a MAF issue. I'd lean more towards a bad O2, a faulty injector, or an exhaust leak. How many miles on the truck? If there are many miles on it (70kish) I would suspect an O2 first. One thing he can try is to swap those front O2's side to side and see if the code follows the O2 to the other side. Cheap and easy way to test that O2. If the O2 checks out and he's positive there are no exhaust leaks I would start listening to injectors on that side of the motor.
5.3 1500
- Thread starter whitetrash21
- Start date
most likely not MAF related or it would throw 174 and 175 for both banks....I wouldn't completely rule it out but usually both banks will be effected with a MAF issue. I'd lean more towards a bad O2, a faulty injector, or an exhaust leak. How many miles on the truck? If there are many miles on it (70kish) I would suspect an O2 first. One thing he can try is to swap those front O2's side to side and see if the code follows the O2 to the other side. Cheap and easy way to test that O2. If the O2 checks out and he's positive there are no exhaust leaks I would start listening to injectors on that side of the motor.
Forgot to put it up. Turned out to be the intake plenum gasket was bad. It was sucking air over the drivers side head. Replaced that, runs like a champ now. Turns out that was a common problem on that motor/year?? Appearantly those composite intakes dont take ANY pressure to hold them down..... 89 in/lb's.... His ft/lb torque wrench wouldn't even show that low. 
~7.5 ft/lbs, they'll warp real easy at anything over that.
~7.5 ft/lbs, they'll warp real easy at anything over that.