Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

Pops when warm

Thread Tools
 
Search this Thread
 
Old 08-25-2014, 08:54 PM
  #1  
Newbie
Thread Starter
 
toyotamatt's Avatar
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default Pops when warm

my 1990 Comanche 4.0 renix reaches normal operating temp 195 , then wants to crap out , pops through throttle body , like lack of fuel or timong issue ?

any suggestions or links to help diagnose

thanks
Old 08-25-2014, 09:02 PM
  #2  
::CF Moderator::
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,867
Received 1,524 Likes on 1,236 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Default

Timing is controlled by the ECU.

Perhaps coincidentally the fuel pump is overheating and losing pressure as it gets hot.

Could also be a CPS crapping out when warm.

Go to post 7 in my Renix Tips link below and see how to test it. Also, verify teh wire harness routing is correct per the photo in the post.

Gotta ask this also: How many of my Tips have you performed sso far?
Old 08-26-2014, 07:56 AM
  #3  
Member
 
CompleteCherokee's Avatar
 
Join Date: Aug 2013
Location: georgia
Posts: 248
Likes: 0
Received 0 Likes on 0 Posts
Year: 1984
Model: Cherokee
Engine: 4 cyl
Default

Cruiser, we need to find a way for every owner of a Renix to have your list printed out and put in each glovebox
Old 08-26-2014, 08:01 AM
  #4  
::CF Moderator::
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,867
Received 1,524 Likes on 1,236 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Default

Originally Posted by CompleteCherokee
Cruiser, we need to find a way for every owner of a Renix to have your list printed out and put in each glovebox
And a club to beat them over the head with so they do the Tips FIRST.
Old 08-27-2014, 08:57 AM
  #5  
Newbie
Thread Starter
 
toyotamatt's Avatar
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Post the list ?

I would love a printable link to the whole list to keep in my top tool box drawer !

send me one please ..

im tired of going back and fourth to my computer anyway


kindly, matt
Old 08-27-2014, 09:12 AM
  #6  
::CF Moderator::
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,867
Received 1,524 Likes on 1,236 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Default

Originally Posted by toyotamatt
I would love a printable link to the whole list to keep in my top tool box drawer !

send me one please ..

im tired of going back and fourth to my computer anyway


kindly, matt
Somebody around here could do it. Not me. I would love to have it to share like that. What about the photos?
Old 08-27-2014, 09:44 AM
  #7  
Seasoned Member
 
Stabsthedrama's Avatar
 
Join Date: Aug 2014
Location: Lehigh Valley PA
Posts: 486
Likes: 0
Received 0 Likes on 0 Posts
Year: 1989
Model: Cherokee
Engine: 4.0 renix
Default

If you own a renix and haven't at least read through all of cruiser's tips (and done most of them), you're not owning a renix right.
Old 08-28-2014, 12:00 PM
  #8  
Newbie
Thread Starter
 
toyotamatt's Avatar
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Thumbs up

working on TIPS as we speak , will update on results , thanks
Old 08-28-2014, 06:50 PM
  #9  
Newbie
Thread Starter
 
toyotamatt's Avatar
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default working on renix list #1

fuel pump ground before and after, w/die electric grease

Attached Thumbnails Pops when warm-jeep-renix-2.jpg   Pops when warm-jeep-renix-1.jpg  
Old 08-29-2014, 07:38 AM
  #10  
Member
 
CompleteCherokee's Avatar
 
Join Date: Aug 2013
Location: georgia
Posts: 248
Likes: 0
Received 0 Likes on 0 Posts
Year: 1984
Model: Cherokee
Engine: 4 cyl
Default

Lots of guys have recommended using Ox-Gard instead of dielectric grease, especially on grounds (you can get it at Home Depot).
Old 09-09-2014, 02:50 PM
  #11  
Newbie
Thread Starter
 
toyotamatt's Avatar
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default it seams it was the cps sensor , covered with oily dirt and brake fluid



i found one at dealer , nos ?

installed it , what i nightmare to install , sensor itself from top and bolts w/ tape to flex socket and 4 extensions later success ! been idleing over a hour and no problems , i also did coil cleaning as recomended by cruiser 54 and several tests and cleaning , but the sensor tested bad with AC volt test not ohm test !!

oil and dirt build up on sensor coming from bad slave cyl leak over time

thanks everybody who replied, now on to trans issue pulling clutch , lucky i have aisin ax trans and 2wd...

a very special thanks to cruiser 54 and his renix list !!!!!!!!!!!!!!!!!!!!!!!!!!!







Old 09-09-2014, 03:43 PM
  #12  
::CF Moderator::
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,867
Received 1,524 Likes on 1,236 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Default

Good job!!

Help me sleep better tonight by ditching that Fram oil filter.......
Old 09-09-2014, 06:42 PM
  #13  
Moderator CF K9-unit
 
Dumajones's Avatar
 
Join Date: Apr 2012
Location: Alaska
Posts: 5,842
Likes: 0
Received 9 Likes on 8 Posts
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
Default

Originally Posted by toyotamatt
I would love a printable link to the whole list to keep in my top tool box drawer !

send me one please ..

im tired of going back and fourth to my computer anyway


kindly, matt
Like this, Cruiser's Renix tips printable>>> LINK

Last edited by Dumajones; 09-10-2014 at 02:18 AM.
Old 09-09-2014, 11:20 PM
  #14  
::CF Moderator::
 
cruiser54's Avatar
 
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,867
Received 1,524 Likes on 1,236 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Default

Originally Posted by Dumajones
Like this >>>> LINK
Fire up your printer Matt!!!!!!!!
Old 09-10-2014, 07:51 AM
  #15  
Newbie
Thread Starter
 
toyotamatt's Avatar
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default

Originally Posted by cruiser54
Good job!!

Help me sleep better tonight by ditching that Fram oil filter.......
send me a link how , i know this is the rare metric aluminum mounting flange and can be switched to a different one that uses a better / size filter in either top or side position ?

that's all i know , and my flange to block is leaking !

thanks matt...


Quick Reply: Pops when warm



All times are GMT -5. The time now is 07:55 PM.