1993 Isuzu Truck Accelaration

1993 ISUZU TRUCK
236,000 MILES • 4 CYL • 2WD • MANUAL
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J.DERRICKSON
  • MEMBER
  • 1 POST
My truck runs great under 50 mph. Once it reaches that point it gets very sluggish and seems as though it wants to cut off. what could the problem be?
Oct 1, 2010 at 2:23 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Hesitation could be caused by one of the following below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking 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 it.
Oct 1, 2010 at 6:14 PM
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