Question about 1991 GMC Sierra

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1991 gmc sierra truck idles high, and when you step on the gas it sputters you can put the petal to the floor and it feel like its getting no fuel what should could be the issue besides the fuel filter/fuel pump?

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A vacuum pipe air leak.......

Posted on Jul 11, 2010

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1 Answer

Cannot start my truck unless I hold the throttle to the floor. Why?


run fault codes and check for MAP/MAF/VAF sensors and the HO2S sensor operation

May 28, 2014 | 1991 GMC Sierra

1 Answer

Spits and sputters until warm


TUNE-UP, SPARK PLUGS, WIRES, AIR & FUEL FILTERS, FUEL INJECTOR CLEANER IN TANK, ALSO REPLACE PCV VALVE, & MOST IMPORTANT, REPLACE EGR VALVE, IT GETS TOTALLY CLOGED UP, YOUR ENGINE IS KNOWN FOR THAT. I HAVE A GNC 2500, 3/4 TON. SEEN IT ALL. CHANGE YOUR DISTRIBUTOR CAP & ROTOR ALSO. JUST DO IT !!!!!!!!!!!

Feb 14, 2013 | 1991 GMC Sierra

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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.

Mar 02, 2010 | 2003 GMC Sierra 1500

1 Answer

1991 GMC Sierra revs high and bogs out when


idle my be offset or a hose my be off as well

Oct 14, 2009 | 1991 GMC Sierra

1 Answer

1999 gmc sierra 1500 wont start after fueling up


could be as easy as a clogged fuel filter or as bad as putting in a new fuel pump

Jun 26, 2009 | 1999 GMC Sierra

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JUST DONT WANT TO RUN


Check the fuel pump.

Jan 09, 2009 | 1991 GMC S-15 Jimmy

1 Answer

FEELS LIKE GETTING NO GAS


cHECK THE FUEL PRESSURE AT THE RAIL. iF LOW i WOULD CHECK THE INLINE FILTER AND THEN A POSSIBLE PUMP

Jan 09, 2009 | 1991 GMC S-15 Jimmy

1 Answer

1999 Gmc Sierra has no power


Sounds like the fuel supply is inadequate. Check for a plugged fuel filter, or possibly the fuel pump is losing pressure. I had a 93 Chevy V6 that acted the same way, and after checking everything else I replaced the fuel pump, which solved the problem.

Jun 10, 2008 | 1999 GMC Sierra

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