Running "Bumpy" when stopped.

[sailsmen]

Marauder is warmed up, stopped in drive at idle, intermittently runs bumpy and at the same time rich.

It's not missing. Runs fine while driving.

Any ideas?

Thank you in advance for your help.

[Agent2006]

Dirty or defective IAC

[sailsmen]

Thanks, Tried the IAC and it must be something else. Will try the EGR.

Any other suggestions?

[blazen71]

Vacuum leak