How to smooth out slightly rough idle
CF Veteran
Joined: Jan 2009
Posts: 1,964
Likes: 6
From: Baltimore, Maryland
Year: 1994 1993
Model: Cherokee
Engine: 4.0
Senior Member
Joined: Mar 2010
Posts: 812
Likes: 1
From: Eugene, OR
Year: 1989
Model: Cherokee
Engine: 4.7 Stroker I6
yea, but any napa, carquest or whatever is fine. they usually have a standard and premium to choose from. I have used both in other vehicles and have felt NO difference between them. From what I have got from the parts guys is the premiums will last a little longer.
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CF Veteran
Joined: Oct 2010
Posts: 1,756
Likes: 1
From: Salem Nh
Year: 1998
Model: Cherokee
Engine: 4.0
Well I just changed the distributor cap and rotor, idk what one that needs to be replaced is suppost to look like but to me the rotor looked toast aswell as the inside of the cap, I changed them out deff mad a difference but it still has a slight rough idle, so im changeing the air filters and clean the iac. Honestly I dont evn kno were thats located, could someone help me out with how to do so, and can I just clean the tb and iac with carb cleaner?
Senior Member
Joined: Jan 2011
Posts: 730
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From: Joliet, Il
Year: 1996
Model: Cherokee
Engine: HO4.0 I6
Is the neon injector upgrade just a plug and go? I plan on doing it when it gets warmer as well because I thought it was a difficult task.
Senior Member
Joined: Jan 2011
Posts: 730
Likes: 2
From: Joliet, Il
Year: 1996
Model: Cherokee
Engine: HO4.0 I6
Well I just changed the distributor cap and rotor, idk what one that needs to be replaced is suppost to look like but to me the rotor looked toast aswell as the inside of the cap, I changed them out deff mad a difference but it still has a slight rough idle, so im changeing the air filters and clean the iac. Honestly I dont evn kno were thats located, could someone help me out with how to do so, and can I just clean the tb and iac with carb cleaner?
Thread Starter
CF Veteran
Joined: Oct 2010
Posts: 1,756
Likes: 1
From: Salem Nh
Year: 1998
Model: Cherokee
Engine: 4.0
Originally Posted by xj guy
Is the neon injector upgrade just a plug and go? I plan on doing it when it gets warmer as well because I thought it was a difficult task.
Senior Member
Joined: Mar 2010
Posts: 812
Likes: 1
From: Eugene, OR
Year: 1989
Model: Cherokee
Engine: 4.7 Stroker I6
the iac is on your throttle body. theres 2 sensors with plugs on them, the throttle position sensor which is bigger and flatter and the idle air control which is a goldish round thing. its on the left if your at the front of the car looking at the engine.
2 hex screws take it out and spray with carb cleaner. spray the whole throttle body out too.
2 hex screws take it out and spray with carb cleaner. spray the whole throttle body out too.
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