Spark Plug Preferences - JeepForum.com
Reply
 
LinkBack Thread Tools
post #1 of 24 Old 09-24-2009, 05:30 PM Thread Starter
Andymack
Registered User
2000 WJ 
 
Join Date: Nov 2008
Location: Canada
Posts: 22
Spark Plug Preferences

Installing Champion Double Platinum spark plugs tomorrow.

What brands do you guys use? Are the Bosch 4-prong platinum plugs any good?? I've heard mixed reviews.


What other electrical system mods do you recommend??


- = AnDyMaCk = -
Andymack is offline  
Sponsored Links
Advertisement
 
post #2 of 24 Old 09-24-2009, 05:34 PM
ZJWally
Registered User
1995 ZJ 
 
Join Date: Jun 2009
Location: Clarion
Posts: 31
from what i've seen posted around here, platinums dont work well....at least for the 4.0's. I just changed with the standard 1.99 plugs and things are running good. Ive heard of bad gas mileage and misfires after installing platinums.
ZJWally is offline  
post #3 of 24 Old 09-24-2009, 05:39 PM
99avant
Registered User
 
Join Date: May 2008
Location: Marquette, Michigan
Posts: 1,300
Skip

Get the regular champion copper truck plugs

Platinum plugs will do nothing for your 4.7
It was tuned to run on the regular copper plugs

|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

If it aint broke, fix it till it is.
99avant is offline  
post #4 of 24 Old 09-24-2009, 06:02 PM
96ZjBurner
Registered User
1996 XJ Cherokee 
 
Join Date: Sep 2009
Location: Minneapolis
Posts: 117
bosch iridium FUSION there the best plug on the market. thats what i got in my truck. there beast. PERIOD.
96ZjBurner is offline  
post #5 of 24 Old 09-24-2009, 06:04 PM
Turbonut
Registered User
 
Join Date: Nov 2004
Posts: 1,828
As long as the current plugs are firing, no spark plug will increase the performance or fuel mileage, so stick with the factory plug. With the current ignition system, no improvement needed.
Turbonut is offline  
post #6 of 24 Old 09-24-2009, 06:52 PM
dougy147
Registered User
2007 JK Wrangler 
 
Join Date: Jan 2005
Posts: 652
Another vote for factory plugs.

My personal opinion is to stay away from the bosch platinum 2 and +4. I put these in my 4.0 ZJ and the thing never ran right, or up to temp. Installed some NGK and it corrected the problem. I used to work at an Advance, and I noticed that those particular plugs have very few part numbers compared to the application range. Almost like they just decided if the seat type, thread and length were OK it would work. Other plugs have many more part #'s for different heat ranges. Just my

The Past
95 ZJ Laredo 4.0
00 WJ Laredo 4.0 & 4.7
08 WK Laredo 4.7 (traded for tin can)
The Present
07 JK Unlimited Sahara
dougy147 is offline  
post #7 of 24 Old 09-24-2009, 08:23 PM
LordHobbit
Registered User
1993 ZJ 
 
Join Date: Aug 2009
Location: Oregon
Posts: 2,048
I like champion and ngk the best. If you aren't running advanced ignitions, then use regular copper. Try to stay away from Autolites, they are good plugs don't get me wrong, but they don't work so well in mopar engines.

93 red ZJ 190k 4.0. Spent more money than I should have ...

Isn't red the only color a vehicle should be?
If at first you don't succeed, use more speed.
LordHobbit is offline  
post #8 of 24 Old 09-24-2009, 08:46 PM
xJoshxx
Web Wheeler
 
xJoshxx's Avatar
2012 WK 
 
Join Date: Sep 2008
Location: Burlington, Kentucky
Posts: 5,533
Quote:
Originally Posted by LordHobbit View Post
I like champion and ngk the best. If you aren't running advanced ignitions, then use regular copper. Try to stay away from Autolites, they are good plugs don't get me wrong, but they don't work so well in mopar engines.
mybe in your 93 but in my 00 WJ 4.0 autolite XP's i gained 2mpgs

but others were also gapped like .80

Sold4" Hybrid lift TeraFlex coils IRO Adjustable LA's Jks tracbar 1.25spidertrax spacers 265/75/16 Dura-tracs
Quote:
Originally Posted by moPowered View Post
The SRt-8's are a liberty design.
2011 WK2 ORA2 sold
2012 WK2 SRT8 - Current
99 WJ Limited Lifted.
2001 WJ stock 4.0 304k miles
xJoshxx is offline  
post #9 of 24 Old 09-24-2009, 09:37 PM
wickerham
Registered User
1993 ZJ 
 
Join Date: Jul 2009
Location: PA
Posts: 810
..copper..
wickerham is offline  
post #10 of 24 Old 09-24-2009, 09:41 PM
JrMechanic
Registered User
1993 ZJ 
 
Join Date: Oct 2008
Location: Lima, Ohio
Posts: 3,370
Autolite 3923's. They are two heat ranges cooler IIRC than the factory 5224's and are well regarded in the ram/dakota world with Magnum series engines, including the 3.7 and 4.7.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
JrMechanic is offline  
post #11 of 24 Old 09-25-2009, 06:16 AM
melloyello
Registered User
1995 ZJ 
 
Join Date: Jan 2009
Location: somewhere over the rainbow
Posts: 294
Quote:
Originally Posted by 96ZjBurner View Post
bosch iridium FUSION there the best plug on the market. thats what i got in my truck. there beast. PERIOD.
best or most expensive thing you could find?
melloyello is offline  
post #12 of 24 Old 09-25-2009, 06:17 AM
melloyello
Registered User
1995 ZJ 
 
Join Date: Jan 2009
Location: somewhere over the rainbow
Posts: 294
Quote:
Originally Posted by xJoshxx View Post
mybe in your 93 but in my 00 WJ 4.0 autolite XP's i gained 2mpgs

but others were also gapped like .80
Had nothing to do w/ the brand of plug. Gap was twice what it was supposed to be.
melloyello is offline  
post #13 of 24 Old 09-25-2009, 07:15 AM
floridajpr
Registered User
2015 JK Wrangler 
 
Join Date: Apr 2007
Location: Jax
Posts: 271
I dont think that Champion makes the truck plugs anymore. I went to their web site and they are not listed and everyone I ask says they are not producing them anymore. I went on the web just a few weeks ago and finnally found 2 boxes(12) of the Champion truck plugs but the auto parts store said that they are going to be the last as they are not making them anymore.
floridajpr is offline  
post #14 of 24 Old 09-25-2009, 08:02 AM
xJoshxx
Web Wheeler
 
xJoshxx's Avatar
2012 WK 
 
Join Date: Sep 2008
Location: Burlington, Kentucky
Posts: 5,533
Quote:
Originally Posted by melloyello View Post
Had nothing to do w/ the brand of plug. Gap was twice what it was supposed to be.
my point exactly doesn't matter on the plug it will be better than the one u had

Sold4" Hybrid lift TeraFlex coils IRO Adjustable LA's Jks tracbar 1.25spidertrax spacers 265/75/16 Dura-tracs
Quote:
Originally Posted by moPowered View Post
The SRt-8's are a liberty design.
2011 WK2 ORA2 sold
2012 WK2 SRT8 - Current
99 WJ Limited Lifted.
2001 WJ stock 4.0 304k miles
xJoshxx is offline  
post #15 of 24 Old 09-25-2009, 09:20 AM Thread Starter
Andymack
Registered User
2000 WJ 
 
Join Date: Nov 2008
Location: Canada
Posts: 22
I put the double plats in - they are Champion and they're practically identical to the NGKs that I pulled out of it.
They don't seem to perform any differently. A little more gradual warm-up, a little less rough on start-up, and better response when shifting so it's like riding a cloud.

Next, I'm gonna get some UpCountry suspension and a BB, then whacky exhaust.

Thanks guys, I'll let you know if these plugs are crap in a few weeks.

- = AnDyMaCk = -
Andymack is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Best spark plug for 5.2L -cAcHe- ZJ Grand Cherokee Forum 17 01-19-2010 09:27 PM
WJ spark plug help joee0914 ZJ Grand Cherokee Forum 4 01-09-2009 12:39 PM
NGK spark plug gap drespecki ZJ Grand Cherokee Forum 2 12-10-2008 07:58 AM
Spark plug effort level & plug recomendations Bville-Bud WK Grand Cherokee & XK Commander Forum 3 11-26-2008 01:02 PM
Spark Plug Gap? 95JpGC ZJ Grand Cherokee Forum 11 01-04-2007 04:43 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome