1988 Toyota Pickup



November, 11, 2010 AT 10:54 AM

Engine Performance problem
1988 Toyota Pickup 4 cyl Two Wheel Drive Automatic 175000 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?


1 Answer



November, 12, 2010 AT 10:43 AM

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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