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2002 Vortec Hard Starting

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#1 randyh82



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Posted 10 December 2012 - 03:43 PM

I have a 2002 Vortec 5.7 in my Express 3500 van.

It has become very hard to start lately.
If I spray starting fluid in the air filter opening it cranks up fine,
and will crank fine the rest of the day.
The next day I have to spray it again to get it to start.

I have checked the fuel pressure (engine off) and it is 52 psi.
(it holds the pressure when the key has been turned off)
(once the engine starts, if I check again the pressure goes up to 60 psi)
I have changed the fuel pressure regulator and fuel filter.
Everything looks clean, but the engine refuses to start normally.



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Posted 10 December 2012 - 05:58 PM

Sounds like the fuel pump is weak. Should see 60-66 psi key on engine off.

Edited by 8.1HD/ALLISON, 10 December 2012 - 05:59 PM.

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#3 txab


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Posted 10 December 2012 - 06:55 PM

Sounds like the fuel pump is weak. Should see 60-66 psi key on engine off.


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