sandi bryant wrote: (1992 S10 4.3L CPI Blazer Intermittent Start)
Sometimes will not start, acts like it's out of gas, has fuel pressure and spark. Will then start normally and run good after a few minutes. Sometimes on start, engine will race, and will not stop raciing until turned off. Have replaced coil, rotor button, ig module, cap, fuel filter, plug wires, map sensor, and fuel pump relay. Short of pushing it off a cliff, any ideas would be greatly appreciated. _________________________________________________________
Defective or sticking Idle Air Controller is a likely cause.
Things which may help without buying more parts:
Disconnect and reconnect IAC connector to clean pin corrosion. Remove IAC, clean pintle and seat then reinstall. Push throttle pedal to floor multiple times to clean TPI resistor. Disconnect and reconnect TPI connector to clean pin corrosion. Confirm good vacuum (or electrical) connection to EGR valve. Remove EGR valve, clean pintle and seat then reinstall.
Good luck.
Wendy & John. ______________________________________________________