V6 cranks for several seconds before starting when hot

Tiny
KMORVANT
  • MEMBER
  • FORD F-150
4.2 2002 V6 starts great when cold. When it's hot and sits for 15 to 20 min. It will take several seconds to start.
Thursday, November 8th, 2007 AT 3:35 PM

6 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Try priming the engine a bit before starting it. Turn the key to the on position then hold there for 5 secs then turn off repeat this 3-5 times.

Then crank the engine, if it starts right up check the fuel pressure regulator or fuel pressure check valve.
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Thursday, November 8th, 2007 AT 7:03 PM
Tiny
KMORVANT
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  • 4 POSTS
The regulator has no bolts holding it on. Does it have a spring like the hoses or does it come off some other way?
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Saturday, November 10th, 2007 AT 3:17 PM
Tiny
BLACKOP555
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THERe should be screws on it, sometimes you have to take off the fuel rail inorder to access the screws to remove it.
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Saturday, November 10th, 2007 AT 4:03 PM
Tiny
KMORVANT
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The new one does not have any screw holes to attach. It looks like it just slides in and is held by some sort of clip or maybe those spring type connectors. I can't see it only feel it.
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Saturday, November 10th, 2007 AT 4:14 PM
Tiny
BLACKOP555
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Take off the manifold, it would be a good time to clean that out also. Once thats off take off the fuel rail, using this as a good time to clean the injectors also. Once you have that all off examine it. It may be a simple snap on type that a firm pull would pull it off.
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Saturday, November 10th, 2007 AT 4:24 PM
Tiny
KMORVANT
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I'm curious as to how overheating (which it does not do) or a clogged radiator situation would cause it to take several seconds to start after sitting for more than 20 min. Or so. Priming it by turning the key on and off works and it will start up right away. I changed the fuel pressure regulator but that did not help. It is held in by an inside c clamp. It will start right away when it's cold so I don't think that the check valve in the fuel pump is the problem.
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Sunday, November 11th, 2007 AT 10:01 PM

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