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Old 09-05-2012, 08:57 PM
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hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,325
Mein Auto: 1995 318is / 1993 325is
The alternator has been replaced. OK. Is it actually putting out the rated amperage? Because your last clue makes me think it's marginal at best. Turning on the lights and/or air conditioner should have very little if any effect on engine speed and smoothness. I think you're running on battery mostly, and it's barely able to keep the ignition running.
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1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
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