Idle low?

Reply Subscribe

Thread Tools

Search this Thread

02-27-2019, 12:11 PM

johnston

Newbie

Thread Starter

Join Date: Feb 2019

Posts: 14

Likes: 1

Received 0 Likes on 0 Posts

Model: Cherokee (XJ)

Idle low?

I have a 89 Jeep Cherokee limited 4.0 and my idle is low I’m not to sure what it is also when I apply the brakes the idle drops to probably 250-350 and the radio goes out happens especially when the lights and heater are on I don’t know what to do any help please

Reply Like

02-27-2019, 02:36 PM

tech

CF Veteran

Join Date: Jun 2016

Location: Santa Clarita California

Posts: 2,138

Likes: 0

Received 277 Likes on 243 Posts

Year: 2001

Model: Cherokee (XJ)

Engine: 4.0L

Have you checked the idle control motor ? and for the radio going out hows the charging system ? is the voltage dropping low ?

Reply Like

02-27-2019, 02:41 PM

gat

Senior Member

Join Date: Mar 2016

Location: Oklahoma

Posts: 621

Likes: 0

Received 9 Likes on 9 Posts

Year: 1992

Model: Cherokee

Engine: 4.0L L6 PowerTech (stock)

Idle...
I'd clean the idle air intake and the valve around it. I believe that idle is adjustable on that Renix.
Idle and radio...
Clean grounds, check the voltage on battery before started and after starting. Check the voltage with the heater on et cetera. Post those results.

Reply Like

02-27-2019, 05:39 PM

tjwalker

CF Veteran

Join Date: Nov 2010

Location: In the middle of Minnesota!

Posts: 5,805

Likes: 114

Received 99 Likes on 88 Posts

Year: 1999

Model: Cherokee

Engine: 4.0

You have an 89 XJ, which is a RENIX.

Below is a link to a website that you should absolutely bookmark. Read through it. Perform the tips that Cruiser recommends. He knows his stuff when it comes to your vintage.

http://cruiser54.com/