Question about 1998 Chevrolet K1500

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93 yukon 350 wont stay running at idle

If i put gas in tbi it runs but at idle i can see the injectoors shut off in turn truck stall but if u stay on gas it runs now it wont start un less u put gas in tbi it has a new fuel pump,,was looking at pcm,s today? idle air controll?

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  • Anonymous Mar 21, 2014

    350 eng. a/t

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Mine was doing the same. throttle positioning sensor was the prob.

Posted on Jul 27, 2009

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When you crank the engine do you see fuel spraying from injectors .if you dont check for power at injector connectors one side should power and the other will be ground controlled from pcm.you can test with a 12 volt test for both. first test with test light grounded for power then test with test lead clip to battery to pos to the other wire from pcm while cranking engine light should flash.if it does turn key off again lean over tbi and have somone turn key on and listen for fuel circulating through tbi unit if you hear it without cranking engine replace fuel pressure regulator.

Posted on Dec 13, 2008

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