How to smooth out slightly rough idle
#1
CF Veteran
Thread Starter
Join Date: Oct 2010
Location: Salem Nh
Posts: 1,756
Likes: 0
Received 1 Like
on
1 Post
Year: 1998
Model: Cherokee
Engine: 4.0
How to smooth out slightly rough idle
My rig is starting to idle a little rough, anyone have so ideas to fix it? Iv replaced the plugs not to long ago, replaced the plug wires the other day, put a new exhuast on. I was kinda low on oil but iv added some and plan on changing it later this week as well as changing the air/breather filter. Is there anything I can do? I also plan on doing the injector upgrade once it warms up a bit
#2
CF Veteran
Join Date: Nov 2010
Location: In the middle of Minnesota!
Posts: 5,805
Received 99 Likes
on
88 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
1. Finish that tuneup! You need a fresh distributor cap and rotor as well. Stay away from Bosch plugs.
2. Cleaning both the idle air control and the throttle body is recommended
2. Cleaning both the idle air control and the throttle body is recommended
#4
CF Veteran
Thread Starter
Join Date: Oct 2010
Location: Salem Nh
Posts: 1,756
Likes: 0
Received 1 Like
on
1 Post
Year: 1998
Model: Cherokee
Engine: 4.0
Originally Posted by tjwalker
1. Finish that tuneup! You need a fresh distributor cap and rotor as well. Stay away from Bosch plugs.
2. Cleaning both the idle air control and the throttle body is recommended
2. Cleaning both the idle air control and the throttle body is recommended
#6
CF Veteran
Thread Starter
Join Date: Oct 2010
Location: Salem Nh
Posts: 1,756
Likes: 0
Received 1 Like
on
1 Post
Year: 1998
Model: Cherokee
Engine: 4.0
Originally Posted by cjjackson2400
upgrade fuel injectors.
#7
Seasoned Member
Join Date: Sep 2010
Location: huntsville alabama
Posts: 343
Likes: 0
Received 1 Like
on
1 Post
Year: 1999
Model: Cherokee
Engine: 4.0 inline 6
Originally Posted by jeepxj19
Again I plan on doing that when its a bit warmer, my sister neon got wrecked so im gonna grab the injectors outa that
Trending Topics
#8
CF Veteran
Join Date: Nov 2010
Location: In the middle of Minnesota!
Posts: 5,805
Received 99 Likes
on
88 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Not the distributor, just distributor CAP, which installs on top of the distributor. And under that cap is a ROTOR, which just slides onto a shaft.
Get a new distributor cap and rotor. Money well spent. Ask for a cap with brass contacts. Better than the aluminum contacts on a cheap distributor cap and only a few bucks more.
Very easy to replace but it is very important not to mix up where the plug wires go! So label them or do one at a time.
Get a new distributor cap and rotor. Money well spent. Ask for a cap with brass contacts. Better than the aluminum contacts on a cheap distributor cap and only a few bucks more.
Very easy to replace but it is very important not to mix up where the plug wires go! So label them or do one at a time.
#9
CF Veteran
Thread Starter
Join Date: Oct 2010
Location: Salem Nh
Posts: 1,756
Likes: 0
Received 1 Like
on
1 Post
Year: 1998
Model: Cherokee
Engine: 4.0
Originally Posted by tjwalker
Not the distributor, just distributor CAP, which installs on top of the distributor. And under that cap is a ROTOR, which just slides onto a shaft.
Get a new distributor cap and rotor. Money well spent.
#12
Senior Member
Join Date: Mar 2010
Location: Eugene, OR
Posts: 812
Likes: 0
Received 1 Like
on
1 Post
Year: 1989
Model: Cherokee
Engine: 4.7 Stroker I6
yea do the cap and rotor, just a few screws pop on and off, 10 minute job. they are like $20 for both.
ALSO FUEL FILTER!
Take the intake boot off and spray and clean the intake out really good, preferably before the new injectors so the dont get crudded up. as said take out the Idle control valve and clean it
ALSO FUEL FILTER!
Take the intake boot off and spray and clean the intake out really good, preferably before the new injectors so the dont get crudded up. as said take out the Idle control valve and clean it