New to me renix
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 536
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From: Lyons, Oregon
Year: 1991
Model: Cherokee
Engine: 4.0 HO
Just bought a '90 Wagoneer Woody Limited. It needs some work but with what I've learned working on my '91 and what you guys will teach me I'm sure I'll get it back in shape quick. It's an auto with the xfer case that has full time and part time 4x4 (which one is that again?). The first problem I want to tackle is it idles low, and will occasionally die when accelerating from a start or coming to a stop. What should I look at first? Thanks. Coach
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Joined: Aug 2011
Posts: 43,971
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
242 transfer case.
Lots of stuff to do on a Renix to insure trouble-free ownership. Cheap and easy. Want a list of my Renix write-ups to choose from? I'll even prioritize them for ya.
Lots of stuff to do on a Renix to insure trouble-free ownership. Cheap and easy. Want a list of my Renix write-ups to choose from? I'll even prioritize them for ya.
Senior Member
Joined: Oct 2011
Posts: 731
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From: St. Albert
Year: 1989
Model: Cherokee
Engine: 4.0L I6
A good place to start is always with a good tuneup- New distributor cap/rotor with brass contact, new spark plug wires, new plugs (many people on here have had good experiences with Champion Coppers), give the throttle body a good cleaning, clean the IAC, adjust the TPS, give it a good oil change with a quality filter (for example WIX/Napa Gold), change out the air filter if it needs it.. This shoulda-oughta help out at least some!
CF Veteran
Joined: Feb 2012
Posts: 1,206
Likes: 2
From: Southern Oregon
Year: 1990
Model: Cherokee
Engine: 4.0
Originally Posted by cruiser54
242 transfer case.
Lots of stuff to do on a Renix to insure trouble-free ownership. Cheap and easy. Want a list of my Renix write-ups to choose from? I'll even prioritize them for ya.
Lots of stuff to do on a Renix to insure trouble-free ownership. Cheap and easy. Want a list of my Renix write-ups to choose from? I'll even prioritize them for ya.
CF Veteran
Joined: Jan 2012
Posts: 1,057
Likes: 2
From: Nazareth/Pen Argyl, Pennsylvania
Year: 1989
Model: Cherokee
Engine: 4.0L 242ci I6
I think cruiser should sell his write-ups. And then give me 20% of the profits for the idea
And this is how I operate my 242 without any probems:
1. Stop jeep
2. Put tranny in neutral, keep foot on brakes
3. Move 4x4 lever into desired range (neutral and 4lo tend to be tight and tricky, give it a good pull but don't completely force it)
4. Once desired range is selected, put tranny in drive, pull away slowly, and make sure the dash lights come on to show it is engaged. (part time will show for 4lo also) It should handle a little tougher, depending on the surface you are driving on and the range you are in.
5. To disengage, repeat steps 1-3 and make sure lights go out and it drives like it should in 2wd.
**note: Full-time can be used all the time, just beware of drivetrain wear, tire wear, and less mpg's. Part-time should be used only offroad on loose surfaces. Reserve 4lo for offroad in mud, sand, or snow. 4lo is used for optimum traction on tricky surfaces.
Have fun wheeling!
And this is how I operate my 242 without any probems:1. Stop jeep
2. Put tranny in neutral, keep foot on brakes
3. Move 4x4 lever into desired range (neutral and 4lo tend to be tight and tricky, give it a good pull but don't completely force it)
4. Once desired range is selected, put tranny in drive, pull away slowly, and make sure the dash lights come on to show it is engaged. (part time will show for 4lo also) It should handle a little tougher, depending on the surface you are driving on and the range you are in.
5. To disengage, repeat steps 1-3 and make sure lights go out and it drives like it should in 2wd.
**note: Full-time can be used all the time, just beware of drivetrain wear, tire wear, and less mpg's. Part-time should be used only offroad on loose surfaces. Reserve 4lo for offroad in mud, sand, or snow. 4lo is used for optimum traction on tricky surfaces.
Have fun wheeling!
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Thread Starter
Senior Member
Joined: Jan 2010
Posts: 536
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From: Lyons, Oregon
Year: 1991
Model: Cherokee
Engine: 4.0 HO
I guess what I meant to ask is what is the difference between full time and part time? My '91 has part time, meaning it is only in 4x4 when I engage the transfer case, I had a chevy that was full time meaning the front end was always engaged, so how does this work? Thanks.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
In "Full Time", the front and rear are not locked and can be used more freely.
In full time, if one wheel is on ice, or air, you can be at a stop with just that wheel spinning. (I think)
In part time, one on the rear, and one on the front needs to loose traction before you stop.
(as "Limited", said)
Seasoned Member
Joined: Jan 2011
Posts: 266
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From: Canon City CO
Year: 1989
Model: Cherokee
Engine: Renix I6 4.0!
Check your o2 sensor. Those bastards cause a lot of grief when not working properly. Congrats on the waggy btw! I love em i just never see them here
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Joined: Aug 2011
Posts: 43,971
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Here's the list. Asterisk means it's been done. The others are awaiting time and inspiration.
Revised 04-18-2012
* means instructions have been written.
1-Ground refreshing, adding engine bay grounds, link to Kelleys WIP*
1a-Improving the instrument panel ground*
2- Checking sensor grounds*
2a- Repairing sensor grounds*
3-C101 Connector Refreshing*
4-Connector and relay /receptacle refreshing*
5-Coil/ICM contacts*
6- Snugging up intake manifold bolts
7-Throttle body and IAC cleaning
8-TPS testing and adjusting*
9-CPS testing and adjusting*
10-CPS wiring bypass
11-ECU connector refreshing
12-Distributor indexing
13-O2 sensor diagnostics
14-Setting base idle
15-Valve cover mod*
16-Sensor ground upgrade*
17-CPS Timing Advance Mod*
18-Headlight Harness Installation*
19-Trans Plug Connector Refreshing*
20- Rear Main Seal Diagnosis*
21-Vacuum Test For Exhaust Restriction*
22-Restoring Throttle Butterfly Adjustment
Revised 04-18-2012
* means instructions have been written.
1-Ground refreshing, adding engine bay grounds, link to Kelleys WIP*
1a-Improving the instrument panel ground*
2- Checking sensor grounds*
2a- Repairing sensor grounds*
3-C101 Connector Refreshing*
4-Connector and relay /receptacle refreshing*
5-Coil/ICM contacts*
6- Snugging up intake manifold bolts
7-Throttle body and IAC cleaning
8-TPS testing and adjusting*
9-CPS testing and adjusting*
10-CPS wiring bypass
11-ECU connector refreshing
12-Distributor indexing
13-O2 sensor diagnostics
14-Setting base idle
15-Valve cover mod*
16-Sensor ground upgrade*
17-CPS Timing Advance Mod*
18-Headlight Harness Installation*
19-Trans Plug Connector Refreshing*
20- Rear Main Seal Diagnosis*
21-Vacuum Test For Exhaust Restriction*
22-Restoring Throttle Butterfly Adjustment
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0


