What did you do to your Cherokee today?
04-24-2015, 11:47 AM
CF Veteran
Join Date: Apr 2011
Location: Carrollton, GA
Posts: 14,553
Likes: 0
Received 1 Like
on
1 Post
Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output
04-24-2015, 12:52 PM
The C101 connector is located on the driver’s side firewall above and behind the brake booster. It is held together with a single bolt in it’s center. To get the connectors apart, simply remove the ¼” bolt and pull the halves apart. You will find the connector is packed with a black tar like substance which has hardened over time.
Take a pocket screwdriver or the like and scrape out all the tar crap you can. Follow up by spraying out both connector halves with brake cleaner and then swabbing out the remainder of the tar. Repeat this procedure until the tar is totally removed. This may require 3 or more repetitions. Wipe out the connectors after spraying with a soft cloth.
Take a pocket screwdriver or the like and scrape out all the tar crap you can. Follow up by spraying out both connector halves with brake cleaner and then swabbing out the remainder of the tar. Repeat this procedure until the tar is totally removed. This may require 3 or more repetitions. Wipe out the connectors after spraying with a soft cloth.
04-24-2015, 01:18 PM
CF Veteran
Best way to clean the c101 connector...... remove it. I did and still have a little gremlin with pms that shows up once in a while, far less than it used to, just need to give it a good fatherly smack and it's better.
04-24-2015, 02:03 PM
Senior Member
04-24-2015, 04:21 PM
Might have been faster if I'd had the nerve and the solder. It's down to the point now where it just needs cleaning rather than excavation
The Jeep runs okay before and after, just a tiny bit of roughness at idle and it varies maybe 100 rpm.
04-24-2015, 04:28 PM
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
04-24-2015, 04:29 PM
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
That sounds like O2 sensor.
04-24-2015, 04:47 PM
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
04-24-2015, 05:01 PM
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
Posts: 18,251
Likes: 0
Received 13 Likes
on
12 Posts
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Are you asking about one that is currently for sale in your area or are you posting a wanted ad for one of the rarest Jeeps ever made in the "What did you do to your cherokee today?" thread instead of Buy & Sell?
04-24-2015, 06:13 PM
No, just got the jeep a couple weeks ago. I'm gradually catching up on things; for instance I changed the plugs, wires, rotor, and cap.
04-24-2015, 07:07 PM
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Eliminated the c101?
Which plugs did you use?
I would replace the O2 sensor with an NTK brand, not Bosch.
04-24-2015, 08:14 PM
I just cleaned the c101 this morning. I can weld heavy equipment but I'm not much of a hand with electric solder.
AC Delco plugs, because I've used them a lot and it seemed like the best they had at the parts store (little bitty town).
FWIW, the emission light is on. Being in Montana I figured it wasn't anything to worry about.
04-24-2015, 08:23 PM
CF Veteran
Join Date: Jan 2015
Location: Southern Maryland
Posts: 1,381
Likes: 0
Received 1 Like
on
1 Post
Year: 1991
Model: Cherokee
Engine: 1999 4.0L
Emission light is tied to odometer, comes on automatically every some thousand miles to remind you to get O2 replaced. Just get somebody with a Jeep-aware scanner to clear it