3800 Series1 Pulsing

[IO_303]

Well as of about a week ago my car suddenly defvloped a pulsing when I am holding speeds, also the Idle is a little rough and low, but when you put it in park it runs fine. My plugs and wries are new. I tested all the coil packs, and they are doing fine. On my todo list is to clean the EGR valve tubing and change tranny fluid beacuse it is a little brown but does not smell burnt. Any other Ideas to look at with this problem??

[DiscoStudd]

I would try cleaning out the IAC motor (and also clean out the bore where it sits in the throttle body.) If the problem persists after that, I would check either the crank sensor or fuel pressure regulator...