rpm

[baby6]

Okay so here's the rundown: Idle is fluctuating between 5 and 9 hundred RPM on startup only. Rev it a little, drive it a little, no problem. However, if you just let it sit and don't rev or move the car, the "check engine" light comes on.I don't have any vacum leak.Do you know what can be wrong??????

 

[Kirby]

My E36 did this. I replaced the oxygen sensor and the problem hasn't returned.

 

[selavia]

/\ I concur; also, pull the CEL code too, and see if that fits.

Sean

 

[baby6]

I changed o2 sensor and is still same how can I get code from check engine light????

 

[B M W]

What year and make is it?


Might be your spark plugs. When was the last time you changed them?

 

[baby6]

Is 95 318i sedan I changed spark plugs like 2 weeks ago.But I think when I change o2 sensor I have to reset computer I don't know how to do it Some body say just disconnect battery Is that right???How can I scan what code is showing check engine light?????