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2000 GMC Savana 3500 Question: 2001 GMC cranks but will not start

 

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lost and confused, East Peoria, IL, December 16, 2012, 17:59
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Have spark and turn on truck and fuel pump works and getting gas out of fuel filter. Engine will fire on either but not stay running

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  • Answer #1

    December 16, 2012, 18:11
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     Master

    My guess is fuel pump is weak, need to know how much pressure it has!
    JUST REPLACE THE PUMP! GM 11 years old, i bet that is what it is going to take to fix your truck!!!
    Done been there lots of times. It can be off by 3 psi. and it aint going to run!

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  • Answer #2

    December 16, 2012, 20:07
     Master

    Got PULSE?....... Are injectors working? If it has fuel pressure and spark and will run by spraying ether or carb. spray into it , then maybe no signal to injectors?.....No air leaks between mass air flow and throttle body? That will also stop or greatly reduce fuel delivery. Do you have 2 vans both a 2000 and a 2001? your post has both years on it and if you do and they are both 5.7L , then maybe you can swap MAF and see if that does the trick.

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  • Answer #3

    December 17, 2012, 01:48
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     Master

    Need to perform a fuel pressure and volume test with a fuel pressure test gage.

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  • Answer #4

    Greg's Orange Auto (13943 Answers) , Orange, CA - (714) 361-9386
    globalhelper December 17, 2012, 06:44
     Master

    poss low fuel pressure even though you have some pressure you may not have enough to stsrt

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