Rough idle
Thread Starter
Member
Joined: Mar 2012
Posts: 166
Likes: 0
From: Port Orange,FL
Year: 1999
Model: Cherokee
Engine: 4.0
Rough idle
Just did tune up, cap, rotor, plugs and wires and I still have a rough idle while at a stop in drive. Idle is at a steady 750 but feels rough in jeep.
CF Veteran
Joined: Oct 2011
Posts: 4,440
Likes: 3
From: Seal Beach, CA
Year: 1996
Model: Cherokee
Engine: 4.0 HO Straight Six
Clean your throttle body. Put on a new throttle body gasket.
Clean your IAC. Disconnect it from throttle body, scrub it with an old toothbrush and some carb cleaner.
Consider replacing your upstream o2 sensor with a quality NTK brand sensor from rockauto.com.
Check to see if your exhaust manifold is cracked. That can cause a rough idle.
Clean your IAC. Disconnect it from throttle body, scrub it with an old toothbrush and some carb cleaner.
Consider replacing your upstream o2 sensor with a quality NTK brand sensor from rockauto.com.
Check to see if your exhaust manifold is cracked. That can cause a rough idle.
Last edited by ZINGGG; Apr 13, 2012 at 01:12 AM.
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