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Old 09-01-2009, 02:08 PM   #1
1st Gear Newbie
m3mannie's Avatar
Join Date: Jul 2009
Location: Canada
Posts: 5

I bought a new battery for my e30
and it died on me last night while i was driving
is it possible that there is something wrong with the alternator or the battery??
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Old 09-01-2009, 02:40 PM   #2
14 Years with the E30
InfiniteDice's Avatar
Join Date: Sep 2006
Location: St. Catharines
Posts: 1,154
Test the voltage at your cig lighter when you start the car... should be about 13.4 or something. If it's 12v or lower... the alternator isn't charging. Try reving it to 2.5 - 3k.... that will charge the field in the Alternator and it will then come up to 13.X.

If this is the case, then check small wires on the alternator. One of them is to charge the coil, if that is loose or corroded then it may not charge.

Alternatively it could just be your voltage regulator on the alternator... a separate part that can be bought for 20 - 30$.

Good luck.

Performance one step at a time.
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