CHEVY STALLS WHEN A LOAD IS PUT ON THE ENGINE

1988 Chevrolet Cheyenne

Tiny

tonkatoy

July, 30, 2010 AT 12:52 AM

Engine Performance problem
1988 Chevy Cheyenne 6 cyl Two Wheel Drive Automatic 228521 miles

The truck idled rough but drove when I got it. After it sat for a few months while repairing the body it would stall out when you dropped it in gear, we put a tps, iac, map, coolant temperature sensor and an egr on it, checked the fuel pressure and it was fine. We also checked for vaccum leaks and checked the intake manifold gasket and no leaks were found. Now it goes on a flat surface about 25, but when you try to accelerate on the flat or a hill it bogs down and you have to feather the gas to keep it alive, I am at a loss and have run out of ideas of what it could be.

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1 Answer

Tiny

rasmataz

July, 30, 2010 AT 1:01 AM

Lack of acceleration, chugging, hesitating, bogging etc. 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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