rough idle problem

[bryan318isred]

Hey im new here, i just bought a 91 318is and love her.

She has a rough idle though

When started from cold or hot it idles around 1000, but then the engine seems to misfire and sputter/shake then shots right back up. Ive checked the plugs, and for a vacuum leak. no leaks and the plugs are clean. from what ive read it seems like it could be the ICV ( not sure if thats the proper name)

Thanks for the imput

[B318M42W]

clean the ICV... it's located at the back of the engine, right between the upper intake manifold and firewall... if that doesn't work... take a look at "the mess under the intake" thread... lots of good stuff there

[bryan318isred]

thanks, i will clean it first thing in the morning, hopefully works