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2005 silverado starting issues

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Old April 1st, 2017, 2:27 AM
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Default 2005 silverado starting issues

I have a 2005 Chevy silverado with a 5.3 vortec 4X4 and after it sits for awhile to get cooled down when I go to start the truck I have to hold the key for about 3-5 seconds it cranks over a few times then it starts but when it starts it lowers idle then goes back to normal idle which is around 500 rpms
Old April 1st, 2017, 7:59 AM
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the fuel system may be leaking down...losing it prime. prime the fuel rail before starting; cycle the key to run for 2 seconds and repeat 3x before turning the key to start.

If it starts normally after priming, the fuel system is leaking down; either back to the tank or from the injectors into the cylinders. a pressure test with a fuel gauge can confirm this.
Old April 1st, 2017, 6:26 PM
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Originally Posted by tech2
the fuel system may be leaking down...losing it prime. prime the fuel rail before starting; cycle the key to run for 2 seconds and repeat 3x before turning the key to start.

If it starts normally after priming, the fuel system is leaking down; either back to the tank or from the injectors into the cylinders. a pressure test with a fuel gauge can confirm this.
what part would be causing it to leak down
if it was doing that




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