Altenator went bad...... - TCCoA Forums
 
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post #1 of 4 (permalink) Old 02-09-2011, 05:48 PM Thread Starter
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Altenator went bad......

On my '89 SC, the altenator went out in a way I've never experienced but have heard of them failing this way. Instead of mine not charging, it began to over charge.....lights were brite as heck, radio was going on and off, wipers arms were flying, all sorts of crazy stuff. Got home, popped the hood, and the battery was boiling...even blew one of the caps off about 5 minutes after I got home (had the hood closed just in case that happened before it cooled down). Anyways, took it out to have it checked (that was a pain in the rear...more to do than I thought) and the readings showed the altenator was spiking out at 27.82 volts....have the slip at home. I'm guessing I was well over 200 amps as well....but can't say for sure.

Just courious if anyone has heard of one going out that high??

Oh, I got lucky and didn't fry anything except my high beams---blew both of them during my 15 mile drive home, but everything else works fine.

The early bird may get the worm, but the second mouse gets the cheese!!!
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post #2 of 4 (permalink) Old 02-09-2011, 06:51 PM
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Yep...... voltage regulator went on it, thus the overcharging.

John
1996 TBird LX 4.6
2001 Sable Wagon 3.0 Duratec
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post #3 of 4 (permalink) Old 02-09-2011, 09:20 PM
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I had that happen with the mark 8 alternator in my car. I literally shut the car off on downhills and long straights with no cars behind me to avoid killing my optima on my way to work that day.

lowered, koni sport adjustables, 4.30 tl in aluminum housing, mark 8 trans, j-mod, 93 mark viii ds, antenna hole=gone, kooks headers 1.75" primaries, 2.5" catless duals, midmount magnaflow, 96-97 sport wheels with 255/50/16 sumitomo HTR Zs, optima in the trunk, new motor...94 mark 6/6/08
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post #4 of 4 (permalink) Old 02-10-2011, 11:00 AM
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Yeah it can happen you got really lucky and did not fry your EEC.
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