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1986 Ford F-250 Ford Truck

Tiny
HOLLYS6969
  • MEMBER
  • 1986 FORD F-250
  • V8
  • 4WD
  • MANUAL
  • 104,000 MILES
When my truck hits about 2000 rpm or going up hill it starts jerking, like its not getting enough gas I replaced the tank and fuel filter, spark plugs, wires and now the fuel pump
Friday, May 22nd, 2009 AT 10:02 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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
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Friday, May 22nd, 2009 AT 10:11 PM

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