Mechanics

WHAT WOULD CAUSE MY TRUCK TO SPUTTER WHEN INCREASING SPEED?

1990 GMC Sierra • 180,000 miles

IT TAKES OFF AND DRIVES FINE, BUT WHILE DOING BETWEEN 45 AND 55 WHEN TRYING TO INCREASE SPEED IT WILL SPIT AND SPUTTER LIKE ITS NOT GETTING ENOUGH FUEL.
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ROB WILSON
December 18, 2011.




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.

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 and keep testing.

Rasmataz
Dec 18, 2011.


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