Definate Emergency... Please HELP! - Ford Powerstroke Diesel Forum
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post #1 of 21 Old 02-03-2010, 06:42 PM Thread Starter
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Definate Emergency... Please HELP!

The truck is an '02 F-250 with the gas 5.4...

Out of no where all of the electrical/lights start to fade. The truck sputters and then dies. Will not restart.

I towed it, replaced the Alternator and it has a brand new battery and negative terminal. Truck starts up and drives for about 30 minutes and then the same thing happens again. Im about to check all of the fuses in a minute.

Can someone please explain why its acting as though the alternator isnt charging? I can jump start it but it wont run for long even with the other vehicle stick connected by jumpers. I'm at a loss here and I need this truck for work bright in the AM for work. Please help!
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post #2 of 21 Old 02-03-2010, 06:53 PM
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Bad voltage regulator? Bad batt cable somewhere not on the battery. Bad cable from the alternator?



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #3 of 21 Old 02-03-2010, 06:57 PM
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Will it crank at all after it dies or are the batteries drained? If it still cranks, I would suspect bad fuel pump, getting hot and failing.

If the batteries are drained I don't know.

Greg, USAF Retired

2001 F250 Crew Cab, Long bed, 4X4 PSD
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post #4 of 21 Old 02-03-2010, 07:13 PM Thread Starter
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Once it dies, the battery is drained. The starter just clicks rapidly bc the battery is totally dead. Im about to check the positive cable to alternator. Think maybe the new alternator is junk? Idk. This thing's about to give me an ulcer
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post #5 of 21 Old 02-03-2010, 07:18 PM
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Quote:
Originally Posted by Yahl View Post
Think maybe the new alternator is junk?
That would be the more likely scenario, if you purchased the "new" alternator from anywhere else other than your nearest local Ford dealer. Have you checked system voltage with a DVOM as your engine is running at idle, and when engine RPM is elevated?

http://www.yorkdaleford.com/service.html

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post #6 of 21 Old 02-03-2010, 07:21 PM
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Better yet, have you voltage drop tested all the main battery positive cable connections? How about all your grounds?

http://www.yorkdaleford.com/service.html

Ford Diesel/Senior/Master Tech who placed 2nd overall in Ontario on the Fix-It-Right-First-Visit score for 2010

....who works at a dealership that now employs SOME half decent looking female employees since they overhauled most of the administrative staff

....but STILL loves hot women with big boobies

....and STILL hates working on E-Series with 6.0L
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post #7 of 21 Old 02-03-2010, 07:22 PM Thread Starter
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I can't get it to stay running long enough to check voltage. It's been in my gut that the alternator is junk from the git go. Now Autozone is closed here. Grrrrr!
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post #8 of 21 Old 02-03-2010, 07:33 PM
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Quote:
Originally Posted by Yahl View Post
Now Autozone is closed here. Grrrrr!
This is why it is more worthwhile for you to get yourself a Ford/Motorcraft alternator and/or battery. You will pay more, but much less likely get bad parts, which if you do, you have a 1 year/12,000 mile warranty.

Back to the topic at hand, you do have all your positive and negative cable connections tight and free of "green death" right?

http://www.yorkdaleford.com/service.html

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post #9 of 21 Old 02-03-2010, 07:35 PM
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If you can get it running long enough to jump out and remove one of the battery cables that will tell you if the alternator is junk or not... if it stays running, the alternator is supplying the power/working, if it dies immediately, the vehicle is battery dependent and the alternator is crap.
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post #10 of 21 Old 02-03-2010, 07:41 PM Thread Starter
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I'm thinking it may be the positve to alternator. The cable's lookin pretty rough. Im gonna run and grab another and see what's up. Also, what is the positive cable running from the battery over the topside of the radiator to the drivers fender well. it looks as though someone tapped into it over on the driver's side. This may have nothing to do with my issues but while I'm at it I would love to eliminate any further possibities of a short, etc.


m-chan68... thank you very much for your quick responses. I really appreciate it!
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