Join Date: Sep 2005
Location: Southern Michigan
Installed a new Mopar TPS today, finally got rid of the crazy idle. I tried cleaning the IAC and the throttle body previously, then replaced the IAC with a Delphi part yesterday and still no joy. The TPS worked like a charm though. Not only does my 4.7L HO finally idle consistently at 650 or so (it was swinging from 500RPM to 2,200RPM at idle), but I've noticed the random clunky downshifts have disappeared while cruising.
For anyone that needs one, I found the Mopar TPS on Amazon for $74 shipped.
Edit: Almost forgot. I also bought the cabin air filter kit with the housing and installed that today. The housing is a flimsy Chinese POS, so it blows my mind that Chrysler couldn't spring for something that probably would have cost them $1.50 in bulk when building a $40,000 Overland. With a brand new filter, I didn't notice any loss in air speed/volume from the vents.
2004 Jeep Grand Cherokee Overland