Question about 1992 GMC Sierra K1500

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Starts rough when i start truck it idles veryrough until it warms up a bit. the colder it gets the worse it idles. if i put it in gear before it warms up it will die. once warm it runs fine.

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  • pankratzc Nov 22, 2008

    1992 gmc k1500 5.7 litre engine. 4x4 auto

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  • 373 Answers

Try the plugs plug wires and cap and rotor

Posted on Feb 07, 2009

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1 Answer

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2002 GMC Sierra 6.0 Liter, 140,000 miles. When outside temp is below about 50 degrees and the vehicle has sat it idles to almost 2000 rpm right after starting and then falls on it's face to about 500 rpm. ...


I would look into the coolant temp sensor .
As it sounds to me that the auto enrichener (choke) is letting go too early.

Check that , and let us know what you find !

Thanks!!

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seem like you got the same problem as my scion xa, check the fuel pressure regulater. bad regulater some time smell like leak gas. auto zone might cause you about $80.00.

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