hassoun
Full Access Member
So i've been having this issue since december of last year with my 6.0 01 Denali.
Code is p0300. misfires happen on cylinder 5 mostly but 2 and 4 sometimes. i replaced spark plugs, spark plugs wires, PCV valve, EGR , Coil packs ( just for the ones missing) sea-foamed, checked compression and i still have the annoying code. Truck hesitates and shakes a lot while driving. i ordered one Fuel injector to replace injector#5 and see if it makes any difference. anybody had similar issues ? i hear a leak from somewhere under the engine ( exhaust) so could be my intake manifolds gaskets i dont know.
Code is p0300. misfires happen on cylinder 5 mostly but 2 and 4 sometimes. i replaced spark plugs, spark plugs wires, PCV valve, EGR , Coil packs ( just for the ones missing) sea-foamed, checked compression and i still have the annoying code. Truck hesitates and shakes a lot while driving. i ordered one Fuel injector to replace injector#5 and see if it makes any difference. anybody had similar issues ? i hear a leak from somewhere under the engine ( exhaust) so could be my intake manifolds gaskets i dont know.