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.

Spark plugs

Thread Tools
 
Search this Thread
 
Old 02-03-2013, 11:00 PM
  #1  
Senior Member
Thread Starter
 
ctjkelley's Avatar
 
Join Date: Oct 2011
Posts: 844
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default Spark plugs

What are the best plugs and wires for a 98' 4.0?
Old 02-03-2013, 11:02 PM
  #2  
CF Veteran
 
ZINGGG's Avatar
 
Join Date: Oct 2011
Location: Seal Beach, CA
Posts: 4,440
Likes: 0
Received 2 Likes on 1 Post
Year: 1996
Model: Cherokee
Engine: 4.0 HO Straight Six
Default

Champion copper plugs and Belden wires
Old 02-03-2013, 11:02 PM
  #3  
CF Veteran
 
The Rooster's Avatar
 
Join Date: Feb 2011
Location: Bergen County, New Jersey U.S.A.
Posts: 3,074
Likes: 0
Received 0 Likes on 0 Posts
Year: 1990 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
Default

Originally Posted by ctjkelley
What are the best plugs and wires for a 98' 4.0?
stock Champion Copper plugs and 8.5 magnacor wires
Old 02-03-2013, 11:37 PM
  #4  
Member
 
JeepsAreForSpeed's Avatar
 
Join Date: Apr 2012
Location: Pa
Posts: 154
Likes: 0
Received 1 Like on 1 Post
Year: 1992
Model: Cherokee
Engine: 4.0
Default

I had a performance gain when I put the champions in gapped to .040 and msd wires.
Old 02-04-2013, 06:37 AM
  #5  
CF Veteran
 
tjwalker's Avatar
 
Join Date: Nov 2010
Location: In the middle of Minnesota!
Posts: 5,805
Received 99 Likes on 88 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Default

Champion copper plugs gapped to 035

Plenty of good quality wire options to choose from........just stay away from cheap wires!
Old 02-04-2013, 07:03 AM
  #6  
Senior Member
Thread Starter
 
ctjkelley's Avatar
 
Join Date: Oct 2011
Posts: 844
Likes: 0
Received 0 Likes on 0 Posts
Model: Cherokee
Default

What parts store carry the champions....and wires range from $15-$31-82....kind of a gap from the $31-$82...Bosch was 31 msd was 82...are the Bosch wires worth it?
Old 02-04-2013, 07:45 AM
  #7  
Senior Member
 
diskman's Avatar
 
Join Date: Sep 2008
Location: Sioux Falls, SD
Posts: 897
Likes: 0
Received 12 Likes on 9 Posts
Year: 1999
Model: Cherokee(XJ)
Engine: 4.0L
Default

I found that the dealers wires were cheaper than the "premium" wire sets at Advance/O'Reilly etc. I picked up a set of Mopar wires for under $50. Exact same as the original ones too.

Figure that the original wires lasted 200K miles. Never had good luck with auto-store wires. At all...
Old 02-04-2013, 08:13 AM
  #8  
Herp Derp Jerp
 
salad's Avatar
 
Join Date: Nov 2011
Location: Parham, ON
Posts: 18,251
Likes: 0
Received 12 Likes on 11 Posts
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Default

I love my NGK wires. Same good quality as Belden but they're actually numbered! Helps the tard in all of us. I see them on sale up here for around $24 I think, US prices I guess should be around that.

Champion or NGK copper plugs at 0.035". I wouldn't bother with changing gap unless you've done some upgrades... In which case you should already know what kind of plugs to run lol

Last edited by salad; 02-04-2013 at 08:16 AM.
Old 02-04-2013, 08:55 AM
  #9  
CF Veteran
 
The Rooster's Avatar
 
Join Date: Feb 2011
Location: Bergen County, New Jersey U.S.A.
Posts: 3,074
Likes: 0
Received 0 Likes on 0 Posts
Year: 1990 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
Default

Hmm makes me think magnacor wires where over kill now....
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
neocracka
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
03-28-2020 05:48 PM
carverdave
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
02-06-2019 08:55 AM
BlvdKreeper
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
09-20-2015 01:16 PM
Blue04
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
8
09-12-2015 10:54 AM
neocracka
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
09-05-2015 06:50 PM

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


Quick Reply: Spark plugs



All times are GMT -5. The time now is 04:43 PM.