1991 Ford F-150



June, 29, 2010 AT 7:43 PM

Engine Mechanical problem
1991 Ford F150 V8 Four Wheel Drive Manual 156000 miles

My truck has a couple different problems that all started happening around the same time. First off when first started it idles erratically and usually stalls the first time. When I start driving and give it fuel it hesitates untill it warms up a little. When it is driven for a while and heats up it will stall when I give it alot of fuel and it is also hard to start up after the engine is hot. Can you give me any ideas to what might be the problem or anything I can check to figure it out?


1 Answer



June, 30, 2010 AT 4:45 AM

Inspect and test all the following listed below: Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking, fuel filter or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note: If it doesn't apply disregard.

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