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kvanderlaag
05-10-2007, 11:25 PM
Chris had posted something rather discouraging in the "MkI Common Problems" thread here, and I'm sort of wondering if anyone can elaborate.

For a while, my MkI wasn't charging the battery under load, really, and I was getting all my check lights coming on when I'd have the lights, brake lights, and turn signals all on at once, and it wouldn't really go away until I let her idle for a while or whatever. Mechanic friend of ours sort of thought it might have been a voltage regulator problem, so we found a reman ND alt, and popped it in. It seems to charge a lot stronger, but the voltage still won't come up over 12, ever.

Also of note, the alternator gets really hot. REALLY hot. Like, exhaust manifold hot. Short somwhere, maybe?

I hear the charging system is this bad normally -- is there anything we can do to bring it up to par? It'd be nice to be able to run a stereo on this thing.

ABUSEDDOG
05-10-2007, 11:45 PM
Check the alternator to battery cable/wire for green death or fraying/ cracks.
Just out of curiousity is it rpm limited? ie. only charges over a certain rpm's.



Threads worth checking out.

http://forums.celicasupra.com/showthread.php?t=19856&highlight=alternator.

Maybe you can adapt to mk1


http://forums.celicasupra.com/showthread.php?t=25171&highlight=alternator.

Might help as well

kvanderlaag
05-10-2007, 11:59 PM
Again, it's not RPM limited -- it charges fine at idle, and it charges okay under load, but under load the voltage drops a fair bit.

Josh=MK1
05-11-2007, 12:10 AM
Is it an old battery? A bad cell will still start the car but will also work the Alt constantly making it hot. Just a thought.

kvanderlaag
05-11-2007, 01:01 AM
Battery was slightly low, true enough -- forgot about that. The other odd thing we noticed though was that the alt was only putting out between 10-30 amps, most of the time.

kvanderlaag
05-12-2007, 10:01 AM
Uh...well, we're just retarded, I guess. The alt was missing the top bolt with the tensioner nut, too -- thanks for the thoughts, though. =/