Thread: only running on 6 cyl-help!!!!

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i got my timing fixed put in a new intake (edelbrock performer) and new flow tech 1 5/8 headers i finally got the truck running after finding a bad wire when the motor started heating up all the paint burned off the headers except two when i tried to drive the truck it keeps backfiring i got a new rotor and cap new wires and can not figure this out please help the two cyls not firing are the two in the middle on the passenger side

yeah i double checked the firing and the plug wires are all new the motor got run hot awhile back and i am wondering if that has anything to do with it

that is a really good possibility since my water is a little low also thanks alot i will check that out

Did you use those black plastic-looking head gaskets from GM? they're noted for melting through.

i dont think they were gm but this time i am going to use copper if the compression test is bad for those cyls