1994 Chevrolet C1500 Logo
Posted on Jan 09, 2011
Answered

94 C1500 5.7L automatic trans 150K miles. Recently bought. Has always had an intermittant low idle that lasts a few seconds and goes away.Two weeks ago, I filled up gas tank. Cranked truck, tried to pull away from the station, it stalled and quit running, then wouldn't crank. Towed home replaced fuel pump and filter. OK for a few days. Went for a drive stalled in parking lot and wouldn't crank.Squirted starting fluid into the throttle body and it fired right up. I headed home and it quit twice on the way but cranked both times. I rebuilt the fuel pressure regulator and truck runs now. However, it still has the intermittant low idle as before. So, I am sure it'll quit again, probably miles from home. Any ideas what to check next. The check engine light has never been on during any of this. Thanks, Allen W.

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  • Anonymous Jan 09, 2011

    do you have access to a fuel pressure tester?

  • awill875 Jan 09, 2011

    I can get one but the pump and sending unit assembly are new.

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  • Posted on Jan 10, 2011
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Even though it is a new pump it doesnt mean that it is putting out the correct pressure the fuel pressure for your truck should be between 9 and 13 lbs... do you have a check engine light on?

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  • Posted on Jan 09, 2011
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I would check the vacuum lines thoroughly as one may have collasped or previous owner replaced with a substandard one,which may be partially collaspe then upon warming up will vacuum itself shut causing the motor to surge then fail to run or start if it happens to be a main line that is affected.

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