porkchop1

i have an 05 silverado with 120000 keeps coming up with missfire cyl 1+6 replaced coils plugs wires did compression check checked valve springs nothing seems to be wrong also moved around injectors still the same cylinders looking for advice

89scottsdale

Thats funny, last summer i had a chevy firetruck come in with the same codes. i did the same as you until my boss told me to replace the fuel regulator valve. ran like a new motor after that! that valve cures alot of issues. id also check the fuel pump and pressure before you replace the valve, but im confident you might have a regulator going out