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Old March 14th, 2007, 07:35 PM   #1
coyne
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Default 98 z-71 wont start

fuel pressure 54 lbs ....last time it did start weeks ago ran for 10 minutes then shut off wouldnt restart.........any ideas pm please thanks in advance troy
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Old March 16th, 2007, 10:30 PM   #2
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Try to reset the computer.

1. turn key to run (last click before turning starter).
2. let it set in run position for 20 minutes (no longer, no shorter. use a timer).
3. turn key to off position.
4. start engine.

I have had the won't start problem on and off for years.
A service tech. told me to try this.
Works for me!!
I mostly have this problem 1 or 2 times a year.
Mostly when it has been wet or heavy dew in A.M..

Let me know if this works for you. Good luck!!
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Old March 27th, 2007, 07:18 PM   #3
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key on engine off thats bellow spec if im not mistaken spec is 61-66psi. If it has the poppets like I'm thinking it will not even think about running with any less pressure.
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Old March 27th, 2007, 08:50 PM   #4
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Yep, 54psi is not enough for a vortec 5.7
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Old March 28th, 2007, 12:39 PM   #5
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try a shot of carb clean in the throttle body, if it fires you know you have a fuel delievery problem..
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Old March 29th, 2007, 08:53 PM   #6
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check how many amps the fuel pump is drawing......high= tired pump
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Old March 30th, 2007, 01:28 PM   #7
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It may also be a good idea to put in a new fuel pump relay i was told they tend to lead to fuel pump burn out from excessive voltage drop across them and they only cost like $10.
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