320i problem

Mon Jul 20, 2009 9:49 pm

hi all

recently purchased a 1990 320i (has the m20 engine) with low miles its got 86000 on the clock and runs great only issue with it is in the morning when i start it up or leave it for a long period of time, it starts and the rev counter swings from between 700 up to about 1500 back and forth, and it sounds like its misfiring, it does this for approximately 20-30seconds or so, then calms down and goes back to normal any ideas what might be causing this?

Mon Jul 20, 2009 11:50 pm

Check the connector on your AFM and the connector on your Throttle Position sensor. Had same problem and checking those connector's helped me.

Wed Jul 22, 2009 8:11 pm

what do i need to check them for? im guessing corrosion of the plugs? if you could tell me where abouts these are located would be good, picture would be handy lol

Wed Jul 22, 2009 9:33 pm

Hope someone else can find some pictures, but there is a connector on the AFM, right under it, it's black, you should see the wires, check that it is clean and plugged in. The other is not far from that one, check the same there.

Wed Jul 22, 2009 9:56 pm

http://www.e30zone.net/modules.php?name ... highlight=
This is from when i had this problem.