Electrical misfit
Postmaster
Joined: Apr 2008
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You have a monster 3" alternator pulley, that makes for some rather low alternator speed at idle, hence why it charges only at 13.2 volts. Mine is kinda the same way, and it's a 3G 130-amp alternator too - if I had serpentine belt I could run the 1-7/8" pulley and that would make it spin nearly twice faster at idle thus making at idle the power I now make at cruise speed, but the serpentine belt conversion ain't worth the hassle in my book as it tends to be fairly unreliable and with my stupid luck it will fail on the darkest night under the heaviest rain.
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Postmaster
Joined: Apr 2009
Posts: 4,086
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From: Malahat/Cowichan Valley
well that is the reason for the post. It recently dropped. It isnt stranding me....knock knock....but just makes me nervous. It used to get hit by the GP's and then would zip back up to M on the normal scale which was about 14.3-14.5, now i cant even get it to 14.2 without trottling the heck out of it.
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Postmaster
Joined: Apr 2009
Posts: 4,086
Likes: 1
From: Malahat/Cowichan Valley
Yeah i think i have it narrowed to the alternator. I literally worked over the electrical system and say no change. Likely culprit.....Alt. Just seems too damn new to fail but being a reman, like dave said, what all did they fix?
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
Well in another thread I just posted about a new alternator and voltage regulator installed two weeks ago with under 100 miles on it along with 2 new batteries.
Have not driven the truck for a week, and the batteries are completly dead.
At this point, the only logical choice would be bad diodes in the alternator.
I really wanted to check it out this evening, but pouring down the rain.
Another case of new parts out of the box in worse shape than the old ones they were replacing.
Have not driven the truck for a week, and the batteries are completly dead.
At this point, the only logical choice would be bad diodes in the alternator.
I really wanted to check it out this evening, but pouring down the rain.
Another case of new parts out of the box in worse shape than the old ones they were replacing.
