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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 01-13-2011, 01:57 AM   #1 (permalink)
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Problem with idle when air con is on

I have an 84 318i and when I turn the air conditioner on, the revs go down and it idles really low almost for the motor to go off. Does anyone have any ideas thanks.
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Old 01-30-2011, 05:09 PM   #2 (permalink)
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Download the appropriate electrical troubleshooting manual (ETM) from this site:

http://www.wedophones.com/BMWManualsLead.htm

Since I haven't driven an M10 equipped car in almost 20 years, I can't offer more specific advice. On the later E30s with M20 and M42 motors, the car's computer boosts the idle when it senses the AC compressor is on.

Good luck sorting it out,

RM
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