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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.
Just behind your thermo-time-switch is another temp switch this one has two open prongs on it, bridge the two connectors with a section of wire and see if you idle drops. This switch gives the car a fast idle until warm and when it goes bad it'll have a slightly higher than normal idle. Normally, I just by pass this unless the temp in your area gets below 20 deg in the winter.
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