Question about 1997 GMC Sierra K2500

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1997 gmc suburban 5.7L will not start. it has fire and 40 psi fuel pressure

Lately it has been hard to start when it sits for a while. now it won't start at all.it has fire to the plugs and 40 psi fuel pressure.

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  • seate Oct 31, 2008

    help

  • milkman9 Nov 17, 2008

    when my 97 GMC 5.7L K2500 sits for a couple of weeks without being started, it is really hard to start. Last week it would not start. I replaced cap, rotor, wires, and plugs. Still no start. I am not a great mechanic and I am stuck. Where do I look now?

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40 psi on a 5.7 vortec isn't enough. It's way too low. You need between 55 and 65 psi to run right. To be certain, you could spray starter fluid into the intake and if it starts, fuel is your problem and replace the pump or filter. A lot of times its the filter so keep that in mind too.

Posted on Apr 05, 2012

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I would check the cap and rotor if it has spark and 40 lbs of fuel pressure if cap and rotor are ok check for injector pulse thats the only other thing it can be

Posted on Nov 01, 2008

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