1986 Chevrolet Astro Repair Question
Topics covered: Sensor, Fuel pressure, Coolant.
Mileage: No information provided.
Mileage: No information provided.
Asked on March 16, 2011
86 minivan 4.3 220 tbi
86 astro minivan runs rich and idles rough when stopped at a light but runs fine while driving?
i replaced most sensors, mapp, idle positioning, ECM, IAC. Could it be the fuel metering?
i replaced most sensors, mapp, idle positioning, ECM, IAC. Could it be the fuel metering?
Asked by hepmeAnswer
Replied on March 18, 2011
Probable causes of an engine running rich are as follows:
1.Excessive fuel pressure can be cause by restricted fuel return line
2.Defective Oxygen Sensors.
3.Leaking injectors and fuel pressure regulator.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.
