1988 Toyota Pickup Hesitation

Tiny
MLYON
  • MEMBER
  • 1988 TOYOTA PICKUP
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
At speeds aproaching thirty five mph or under heavy loads the engine hesitates. It idles fine, new plugs and wires, new fuel filter, new transmission filter and fluid. I wonder if the EGR valve could be sticking or have clogged injectors. What should I check first?
Thursday, November 11th, 2010 AT 10:54 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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
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Friday, November 12th, 2010 AT 10:43 AM

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