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Old 04-23-2011, 01:31 PM
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Need help! '99 f350 7.3L

Hello, Im new to the site & have been reading around to try to find similiar problems that my dad is having with his '99 F350 7.3. Site looks great & has givin' me a few things to look into before I made a post.

My parents are in from out of town and his truck is giving him problems that has them worried about driving the 900 miles back home in a couple days.

It has been starting with no issues & running like it should but the service engine soon light is on. After running for a few minutes, as soon as the service engine light goes out, the truck immediately starts to idle rough. Like a fuel problem. While driving, it runs really rough too and feels like it wants to die at red lights. We just changed the fuel filter and he has put two cam position sensors on it in the last two years.

Also, the OD button on the shifter is always lit up in park. When you put it into gear sometimes it goes out & sometimes it doesnt. Pushing the button doesnt activate or deactivate the OD. While driving it'll kick into & out of OD on its own whenever it wants to.
I dont know if these are related but ANY info would be greatly appreciated!

Any idea's of what it could be? They have to leave in a couple days & we need to figure this out before they attempt to drive 900 miles back home.

THANK YOU VERY MUCH!
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Old 04-23-2011, 03:51 PM
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Update:
Changed the cam sensor yet again, checked all vacuum lines and all electrical connections with no change.
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Old 04-23-2011, 04:54 PM
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The thing is,,,, your truck is trying to tell you what's wrong with that SES light. If you got it scanned, you'd know where to start. Also the OD light is like the SES light for the trans so, there are probably codes there as well.

Here's the rub though, you need a special scanner to read our trucks Not all that special really, just a professional one. so, AutoZone and the like can't help and neither is one of those cheap OBD-II code readers gonna work right either.

You need a professional scanner from Snap-On or Mac or Ford. But, even though you have to pay for a real scan, it's gonna save you in the long-run by not "throwing parts" at it you don't really need....
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Old 04-23-2011, 05:01 PM
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My Dad took it to the Ford dealer who had it for 6 hours diognosing it and came up with no codes & could not figure out what was wrong with it.

That's why I'm depending on you guys for help. Who else know's these trucks & their problems than people on the website dedicated to these trucks.
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Old 04-23-2011, 07:39 PM
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Problem solved!!
Thanks to DazDillenger!

It was the ICP sensor for anyone else having the same problem.
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