Mine its a 00' 4.0L ,5 spd.
When I first started in the morning took longer than usual to start,actually I had to push the gas harder to make it run,When it was cold couldn't stay on Idle it stalled righ away unles I leave th rpms @ 1000,but after warming up,well I drove it to my job like 20 min from where I live,and I try to keep in idle and it stays but around 150 or 200 rpms,way to low,any sugestion? fuel pump,ECU,any idle control censor??
other wise the Jeep runs good ,the only problem is whe i leave the gas and the car stalls or stays in very low rpms.
Any sugestion,or similar experience?
Thanks a lot guys.
I'd first guess a dirty IAC (idle air controller). The IAC is what meters air into the throttle body at idle since the butterfly valve that lets air into the engine at other times is closed at idle. Take it off (it's only held on by two small T-25 bolts) and gently clean its solenoid-actuated plunger with carb or throttle body cleaner and a rag or brush. Clean the throttle body oriface it meters air through too.
__________________ When you have a choice, buy American.
It may just be the heat shield vibrating, not the honeycome inside. Make sure the cat is actually bad before you replace it. A bad cat will effect driving at speeds also. Usually feels like your towing a battleship anchor.
Thanks Jerry, I couldnt remember if the whole throttle body had to come out or not. I figured he could clean it all up while he was at it
I had a similar problem with my 2000 TJ 4.0L bogging down when idling. It would stall out if I didn't throw it into drive after starting the engine. Removed the throttle body and IAC and cleaned them off and now it idles fine.