Re: Rough idle please help
Both guys could be right, but I would start with Frango's suggestion. Get a can of carb/throttle body cleaner and pull off the resonator. Spray lightly in the throttle body and open it by hand to wipe up any sludge built up. Use a q-tip or a rag over a small stick to clean the idle air passage (under the main throttle intake) and also pull the idle air motor off the side of the throttle body, and carefully wipe off the tip. Be careful not to push or twist it, they are kinda fragile.
If you are still having problems check out the throttle position sensor, usually you will have more than just a rough idle with that but it could be just starting to go. If you have access to a scan tool with data logging plug it in and watch the TPS value, if it jumps around a lot with gentle pressure on the accelerator, your TPS is bad.
If you're still having problems, check to see if the spark plugs are starting to foul.
My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.