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2002 Ford F-150 Will Not Start, but engine rolls over

Tiny
1500WING
  • MEMBER
  • 2002 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 81,000 MILES
When I attempt to start the truck, it will roll over fine, but does not start. If I leave it sit for awhile (40 Minutes) it will sometimes start. Also, if I crank it, stop it, crank it over a number of times, it may start, as well. I tested the inertial switch, by jumping it, but that didn't do it. I have replaced the fuel filter, to no avail. When attempting a start, the anti-theft light does not come on, but the door locks engage, with the truck in park, and the door open. This happens when using either key fob. I have even removed the battery cables, let it sit for a bit, and it will start after that, not sure if that is coicidental or not.
Any thoughts?
Thanks much -Chris
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Monday, December 10th, 2007 AT 1:14 PM

3 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Are there any codes stored?

Get a real good look at that inertia switch connector, there is a meltdown that occurs on a fair amount of them as well as a weakness in the spring in the switch.
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Monday, December 10th, 2007 AT 3:00 PM
Tiny
1500WING
  • MEMBER
  • 2 POSTS
There are no codes stored on it, at least it is not being reported on the CarChip I have. I actually hard wired the inertia switch, by bypassing the connector as well as the switch itself. Still the same results. I have yet to replace the fuel pump relay.

Thanks much! :)
-Chris
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Monday, December 10th, 2007 AT 4:30 PM
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Well I guess I would go back to basics and try to find what is missing. Probably spark and or fuel. When it doesn't start, I would spray a little carb cleaner or ether in the throttle body and see if it changes anything. Also hook up a spark tester and see if the spark is being lost as well or instead.
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Monday, December 10th, 2007 AT 4:44 PM

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