poor running 325i - BMW Forum

NYRallyChick · 11-06-2005, 07:41 PM

Hi.

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.

Gomerino · 11-09-2005, 01:14 AM

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..

bad man working · 11-10-2005, 02:19 PM

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.