1991 Ford F-150 Engine problems

PATRICKB4201

MEMBER
1991 FORD F-150
V8
4WD
MANUAL
156,000 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?

Tuesday, June 29th, 2010 AT 7:43 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

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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Wednesday, June 30th, 2010 AT 4:45 AM