1988 4x4 K1500
Newbie
My 1988 K1500 5.7 was having some some idling, stalling and no power issues. I've had this truck since 1989 so I know it well. I started the usual trouble shooting method of firing the parts cannon at it and this is what I've replaced: EGR Valve, EGR Solenoid, MAP Sensor, MAP Sensor Vacuum Hose, Throttle Position Sensor, Idle Air Control Valve, Ignition Module, Cap and Rotor, Ignition Coil, TBI Fuel Injectors, Fuel Flow Regulator, Spark Plugs and wires, Fuel Filter, O2 Sensor, Coolant Temp Sensor and finally the Fuel Pump. After all this it was the Fuel pump that was bad. I did not do a fuel pressure test but should have as this may have helped the diagnosis faster. I am planning on keeping this truck forever so all the parts are an investment in the future. 249950 miles and runs like the day I bought it.