BILL NIVEN
Newbie
1990 Silverado K1500 5.7 automatic. Under normal acceleration the truck runs good. Pull out to pass accelerating from 50 mph it has no power and spark knocks pretty bad. You can feel passing gear kick it but will not accelerate.
I have a new TBI, IAC, fuel pump and filter, plugs, wires, ICM, cap and rotor, converter and rebuilt trans. I have replaced every sensor under the hood but no change. Verified initial timing at 0 degrees with computer disabled. Fuel pressure checks normal at idle, had to add Schrader valve.
I have a new distributor but not installed yet.
I am a shade tree wrench Turner and its obvious I have missed something. Any suggestions would be appreciated. I prefer to do my own work and not take to shop.
I have a new TBI, IAC, fuel pump and filter, plugs, wires, ICM, cap and rotor, converter and rebuilt trans. I have replaced every sensor under the hood but no change. Verified initial timing at 0 degrees with computer disabled. Fuel pressure checks normal at idle, had to add Schrader valve.
I have a new distributor but not installed yet.
I am a shade tree wrench Turner and its obvious I have missed something. Any suggestions would be appreciated. I prefer to do my own work and not take to shop.