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2003 GMC Sonoma Question: Cranks several times before starting

 

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Sonoma2003, V6, Mentor, OH, June 24, 2010, 22:20
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Had the fuel pump changed and the problem went away for about 2 weeks. Now it's back to cranking several times before it starts. It starts immediately if I re-start it right after running for awhile. I think the fuel pump is loosing its prime again. What else could be causing this?

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  • Answer #1

    June 25, 2010, 16:13
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     Master

    Was the Check Valve replaced as well? Because this sounds like the Check Valve is bleeding down. The Check Valve holds fuel pressure when you shut off the engine.

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  • Answer #2

    March 26, 2015, 16:13
     Rookie

    Could be dirty injectors. Try using the techron additive. Could also be dirty fuel filter. Also try turning ignition to run for a few seconds first this will run the fuel pump and see it it makes any difference. I have a similar problem adding techron seemed to make it significantly better. At over 135,000 I don't expect it to run like new.

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