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post #1 of 8 Old 06-12-2007, 05:56 PM Thread Starter
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Starting Problem

I hope someone can help me on this. Last Sat. we went off in our '01 Excursion 7.3l PSD. Our trip was about 2-3 hrs. driving time. It ran perfectly. Shut it off & when I went back to start it w/in 1 hr --- it would turn over but not "catch". Checked the codes & nothing. So, we disconnectred the battery cables, reconnected, & it started. Later on that day, we shut it off & it wouldn't start. So, again we took the battery cables off again, reconnected, & it started.

The next day on a cold start, it started several times w/no problem.

Anybody got any idea as to what is going on?
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post #2 of 8 Old 06-12-2007, 06:35 PM
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sounds like u could have a bad cps ( cam position sensor). does it run ok it never shuts off by itself

Brett
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post #3 of 8 Old 06-13-2007, 06:01 AM Thread Starter
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Hey Dirty Diesel

It runs ok. Just have this starting problem. I thought if it was the sensor there would be a code showing the sensor problem. No code so no sensor problem. I also was under the impression that when the sensor went it would never ever start until replaced.

Thanks
George
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post #4 of 8 Old 06-13-2007, 07:10 AM
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I don't believe it will always throw a code, and the problem can be sporadic. They're only ~$25 now, so it's a good idea to change it, cheaper than throwing other parts at it...

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post #5 of 8 Old 06-13-2007, 06:57 PM
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no the cps's are weird somtimes they will go out and never work again and somtimes the will go out and work again right away. ny truck had one go aout and it actually shut off while goin down the road then catch and keep right on chugin for a lil while.

Brett
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post #6 of 8 Old 06-13-2007, 08:59 PM
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When the truck is turning over, does it sound like you have a weak battery by any chance? 7.3 require a minumum amount of voltage before they will send a signal to the components needed to start. You may just need to clean your battery posts or replace a bad battery..

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post #7 of 8 Old 06-13-2007, 09:04 PM
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Quote:
Originally Posted by DirtyDiesel View Post
no the cps's are weird somtimes they will go out and never work again and somtimes the will go out and work again right away. ny truck had one go aout and it actually shut off while goin down the road then catch and keep right on chugin for a lil while.
mine did the same.... it shut off on me while i was driving... i pulled over put it in park and it started right up again... but would shut off like a min later....tried it like 5 times until i had to shut her down.... got it towed to the shop
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post #8 of 8 Old 06-14-2007, 05:59 AM Thread Starter
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Pro star pony

I've got 2 brand new batteries. So, it's not them. If it were a bad battery removing the terminals & reconnecting them like I did to start it would not work. When you have 1 bad battery the lights will work, but there isn't enough oomp to turn the starter over.

Thanks

George
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