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Hard start after warm up

I have a 1998 GMC Sonoma with the 4 cylinder engine/auto transmission. It starts great when it`s cold but after it warms up and you shut it off and restart it again, it cranks for about 10 second or so before it fires up.It cranks fine but it seems like it `s not getting any gas for a while.After it fires it runs great.Right now it`s just a nousence but I`m afraid if I just let it go it will sooner or later let me down. What do you think? Any thoughts will be appreciated. Thanks for your time and patience! Paul

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  • Paul young Jan 12, 2009

    Thanks pierre,I did try pressing down on the throttle a little,but it started harder and seemed to load up(engine rpm`s built up slowly before taking off like it was flooding)I really didn`t pay any attention if it blew black smoke.I will try again soon to see what happens and let you know.I don`t drive it every day. I did put new plugs and wires on it and it didn`t help any.Think it could be the pressure regulater or fuel pump going bad?

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After you turn it off then wait till it gets cold to drive again!! Good luck.

Posted on Jan 12, 2009

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Check Fuel preassure. There is a video on youtube where you can learn how to do it. Also check for any vacuum leaks. Run the engine at 1200 rpms or so. Spray staring fluid over evrry vacuum hose you can find. Or gasket. Where the engine revs up . There is your leak. Repair leak.

Posted on Jan 11, 2009

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When its hot hold the gas pedal just a bit to see if it start better maybe its our idle air control try that let me know pierre

Posted on Jan 11, 2009

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