1997 Ford F150 97 F150 acceleration issue

1997 FORD F-150
200,436 MILES • V8 • 2WD • AUTOMATIC
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CJBROWN3
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  • 1 POST
I have a 97 f150. The truck starts fine. It runs fine sitting still, and allows me to rev the engine in park. When I put it in drive and accelerate, it bogs out. I changed the fuel filter, fuel injector, coil pack, and spark plugs. My next step would be to change the fuel pump, but this route of trouble shooting is getting a bit expensive. Am I even on the right track?
May 24, 2010 at 1:29 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Inspect and test the following below:

Oxygen sensor
Catalytic converter
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
May 25, 2010 at 2:57 AM
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