1995 Ford F-150 Repair Question
Topics covered: Sensor, Engine, Fuel pressure.
Mileage: No information provided.
Mileage: No information provided.
Asked on August 30, 2009
1995 Ford F150 backfire
Engine Performance problem
1995 Ford F150 V8 Two Wheel Drive Automatic 150 miles
The 5l engine idles rough when warm but the big problem is backfire at mid speed with slight exceleration. That will light the check engine light. It will run at full throttle. I have installed platinum plugs, wires, cap & rotor and oxygin sensor. Also cleaned the mass air flow sensor and egr. Help
1995 Ford F150 V8 Two Wheel Drive Automatic 150 miles
The 5l engine idles rough when warm but the big problem is backfire at mid speed with slight exceleration. That will light the check engine light. It will run at full throttle. I have installed platinum plugs, wires, cap & rotor and oxygin sensor. Also cleaned the mass air flow sensor and egr. Help
Asked by 520hughAnswer
Replied on August 30, 2009
Inspect and test the following:
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)
Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:
Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
