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.

how to pass emissions?

Thread Tools
 
Search this Thread
 
Old 02-26-2013, 01:23 PM
  #1  
Member
Thread Starter
 
DirtyBomb's Avatar
 
Join Date: Jul 2011
Posts: 107
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default how to pass emissions?

im trying to get my 96 xj emissions ready as my registration is due for renewal. my scan tool checks for I/M readiness and i keep getting a yellow light. i code for random misfire and cylinder 6 misfire occasionally, which i will check but i can clear those temporarily if needed.
my problem is the oxygen, oxygen heated, and catalyst monitors keep reading "not ready". some times the first two go away but the catalyst monitor keeps flashing.

i have a borla header, new flowmaster cat and ran new 2.5" pipe all the way back. downsteam o2 is fairly new as well. i used to run straight pipe and never had an issues.
what should i be looking at to get these monitors running ?
Old 02-26-2013, 01:26 PM
  #2  
CF Veteran
 
BatmanXJ's Avatar
 
Join Date: Feb 2012
Location: Hamburg AR
Posts: 1,249
Likes: 0
Received 12 Likes on 11 Posts
Year: 1995
Model: Cherokee
Engine: 4.0 HO
Default

Originally Posted by DirtyBomb
im trying to get my 96 xj emissions ready as my registration is due for renewal. my scan tool checks for I/M readiness and i keep getting a yellow light. i code for random misfire and cylinder 6 misfire occasionally, which i will check but i can clear those temporarily if needed.
my problem is the oxygen, oxygen heated, and catalyst monitors keep reading "not ready". some times the first two go away but the catalyst monitor keeps flashing.

i have a borla header, new flowmaster cat and ran new 2.5" pipe all the way back. downsteam o2 is fairly new as well. i used to run straight pipe and never had an issues.
what should i be looking at to get these monitors running ?
IMO you could get it real hot and hope the carbon gets blown out. You could try to drive the mess out of it for about 15 mins before you get it tested. Not sure it that would help or not.
Old 02-26-2013, 01:50 PM
  #3  
Member
Thread Starter
 
DirtyBomb's Avatar
 
Join Date: Jul 2011
Posts: 107
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default

Removing carbon due to the misfire? Would a sea foam treatment work for that?
Old 02-26-2013, 02:06 PM
  #4  
Senior Member
 
elevol92's Avatar
 
Join Date: Aug 2012
Location: Westminster, MD
Posts: 732
Likes: 0
Received 0 Likes on 0 Posts
Year: 1988
Model: Cherokee
Engine: 4.0
Default

Check your plugs, wires, cap, and rotor.
Old 02-26-2013, 02:25 PM
  #5  
Member
Thread Starter
 
DirtyBomb's Avatar
 
Join Date: Jul 2011
Posts: 107
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default

Cap, rotor, plugs, and wires were all replaced within the past 6 months. I used the champion rc12y plugs, something like that. Whichever ones are stock recommended.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
extrashaky
Other Vehicles. Other Jeep models & cars and trucks of other makes
17
06-17-2023 03:57 PM
DynoGuy
Jeep Builds
52
04-26-2016 04:55 AM
carbuff
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
6
09-30-2015 11:24 PM
sbc003
Introductions
2
09-27-2015 11:13 AM
Comanchehungry
Jeep Builds
1
09-25-2015 07:42 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: how to pass emissions?



All times are GMT -5. The time now is 12:14 PM.