Question about 1999 Chevrolet Silverado 1500

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93 Chevy Sub new rebuilt motor and trans, new fuel pump, filter, idle sensor and pressure reg, still will not idle. I can put fuel in throttle body to get started and as long as I keep the idle up it will run let drop to idle it dies and will not start again without more fuel being dumped into thottle body, wht?

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  • dave May 11, 2010

    what is the fuel pressure is it at spec? is there a vacuum leak in the intake? What type of throttle body is it? It sounds like a weak fuel pressure, is it electric or mechanical fuel pump?

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Its possible you have some heavy vacuum leaks? I'd inspect every thing well to identify an open line or poor seal drawing air in.
I hope this may have helped,
Tom

Posted on Oct 02, 2009

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Posted on Jan 02, 2017

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