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Old 06-28-2013, 06:33 PM
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charging problem

hey guys got an 07 w/178,000 on it, it has a large housing or 6G alternator on it. recently i noticed if i start the truck to let it warm up my alternator doesnt kick in even when i wait for 10 minutes. with the AC on the volts drop down pretty low. it does this until i rev the truck up around 2k rpms. so my question is, is it actually the alternator (a diode or something) or is it something else that is not sending signal to the alternator to excite it. Thanks for any insight
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Old 06-28-2013, 06:39 PM
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Nice trucks there btw Yea you have a regulator issue, Fix it before you wipe out the ficm and injectors.
DC Power makes some real nice units that are 100% brand new USA. You can steal the one from the other truck lol.
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Old 06-28-2013, 06:41 PM
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is the dash light for charge issues coming on ?
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Old 06-28-2013, 08:11 PM
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thanks mhatlen, i was looking at alt. options. you have any thoughts on going with the big amp rated ones 180-250 amps. ?

ZMANN, nope no light, that is what kinda confusing about it. my monitor show it to get down to as low as 10.2v while running way after the glows kick off and the AC on. then i rev it up and the volts jump to 13.5-14.0 and the ac blower picks up, lights get brighter ect.
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Old 06-29-2013, 02:43 PM
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Jus bought the 185 OEM. OOH BABY I love it. mhatlen helped steer me there, and I aint lookin back
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Old 06-29-2013, 03:40 PM
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Quote:
Originally Posted by ZMANN View Post
is the dash light for charge issues coming on ?
Funny about the idiot light for the alternator, I was just tooling down the road when my truck started having a seizure. I pulled over and it was idling fine then I shut it off and popped the hood to make sure all was good. When I went to restart the truck it was dead as hell.
Light never came on, had my wife come get me along with my 1.0 gauge jumper cables and got me charged up enough to get home. Next morning I had a no start issue even after charging batteries overnight. YEA ficm was toast along with the alternator. I put a new Ford one on then because of it being under warranty still.
So point being: the light did not come on for me that day and it should have. That is when I went and bought my ScanGaugeII everyone should have something to monitor the engine because the onboard gauges/pcm info center is really bad.

I did have problems a few months later with the Ford alt and that time the light was coming on. ???

Moral of the story is : (1) Get Gauges (2) Get a DC Power alternator 185 amp is a gooood one to have!!
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