Idle Problem Continued

[smoore2199]

Still having weird idle problems...I just replaced the Throttle Position Sensor, Idle Air Control Valve, and the Phelum. The car idles too high at rest the movie shows this...once i unplug the IAC plug the car idles normal, but if i drive it with the IAC unpluged the car still has a tendoncy to hang around 3k rpms. The check engine light was on and i get P1504 which is Idle Air Control Circuit (duh I unplugged it). I've replaced almost everything, is it possible that I replaced a bad IAC with a bad IAC?

MOVIE HERE
http://www.spencerdmoore.com/idle.mpg

 

[Bulldog6Z6]

my did the exact same thing, i have just been running it wit out the iac (it revs down quicker too).

 

[smoore2199]

Yeah but the rpm still hangs around 3000 when driving, and the car feels like its running like crap.

 

[Dan_Soprano]

Did the idle kick down when you unplugged the Throttle Position sensor? If not then next likely cause would be a vacuum leak somewhere.

 

[smoore2199]

Unplugging the TPS has no effect. I sprayed some TB cleaner around the intake and didnt get any surge so i assume that there is no vacuum leak. The only time the rpm drops back down to normal is when i unplug the IAC connector.

 

[Dan_Soprano]

Try a new IAC valve I suppose then.....did you save the recipt from the old one? I got a bad EGR valve a few weeks ago from pepboys. It is possible.