Question about 1991 GMC Sonoma

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The engine will idle fine but when you step on the gas it will spit and sputter at low rpm but once you get going your good. The truck was garage kept and only has 43k on it.

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  • GMC Master
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Sounds like you have defective spark plug wires or low fuel pressure maybe.

Posted on Feb 09, 2012

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Posted on Jan 02, 2017

emissionwiz
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SOURCE: my truck sputters

This is either a plugged fuel filter or a bad spark plug wire.

Posted on Nov 07, 2008

  • 10865 Answers

SOURCE: From red light truck started sputtering and and stalled out

Hello. The GMC Sierra has an electric fuel pump so you should ensure that its fuses and relays are working before checking it. You may need to clean your fuel pump or replace it if your gas tank is not empty, but your vehicle has difficulty getting fuel. The GMC Sierra comes in a variety of styles and trim levels that can affect the replacement fuel pump you choose.

Posted on Mar 02, 2010

  • 492 Answers

SOURCE: Vehicle idle's fine but when

Sounds like it might be caused by low fuel pressure to the injectors. Maybe the fuel filter needs to be replaced. If that doesn't help, then it might also be the electric fuel pump in the gas tank.

Posted on Mar 13, 2011

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Vehicle idle's fine but when you step on the gas it spits and sputters and backfires it is not out of time, new timing chain.


Sounds like it might be caused by low fuel pressure to the injectors. Maybe the fuel filter needs to be replaced. If that doesn't help, then it might also be the electric fuel pump in the gas tank.

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