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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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post #1 of 3 (permalink) Old 11-06-2005, 07:41 PM Thread Starter
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Question poor running 325i


I've got a 1990 325i automatic that's giving me some problems. It runs really, REALLY, crappy. At very light throttle it's bearable, but as soon as I give a little foot it goes all crappy. It runs very rich all the time and when I give it throttle it sputters, stumbles and backfires. I had an old car with a flapper MAF (the same type as my 325) that when it went bad, it gave similar symptoms. Is this a possible (likely) solution? How about the throttle position sensor? Cap? Rotor? Etc.?

Thanks in advance.
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post #2 of 3 (permalink) Old 11-09-2005, 01:14 AM
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in neutral (park) do the rpm's surge?
plenty of things can/will go wrong causing similar symptoms... check/clean your idle control valve.... could be a tear in a vaccuum line... or the idle control module itself may be bad..

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post #3 of 3 (permalink) Old 11-10-2005, 02:19 PM
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Check the throttle switch they fill with oil for a start, test the way it switch I think the centre pin is the feed and the outer two are the idle and the full throttle signals anything in mid throttle is no signal on either outer pin.
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