spark plugs tell me what? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > spark plugs tell me what?

Savvy FOX IFP 4" Lift Shocks in StockSavvy/Currie Aluminum Control ArmsSavvy Aluminum Gas Tank Skid

Reply
Unread 06-30-2012, 01:31 PM   #1
bluedaffy
Registered User
1989 YJ Wrangler 
 
Join Date: Oct 2011
Location: Stevens Point, Wisconsin
Posts: 286
spark plugs tell me what?

Here are 2 views of my spark plugs. The reason I pulled them is to see if my carb and timing settings agree with the condition of the plugs. I'm looking for that mark on the ground strap that shows if the timing is too far retarded or advanced and I can't really see one. Should it be an obvious color change on the metal?

Also, as you can see there is a lot of carbon on the base of the insulator, what does it mean if there is a lot of carbon in this area but not higher up?

20120630_131922.jpg   20120630_131944.jpg  
bluedaffy is offline   Reply With Quote Quick reply to this message
Unread 06-30-2012, 01:43 PM   #2
zeus87gn
Automotive Neurosurgeon
 
zeus87gn's Avatar
1987 YJ Wrangler 
 
Join Date: Sep 2006
Location: Houston, Texas
Posts: 2,413
thats normal ignition to me
__________________
Handicapped license plates are not for mentally handicapped people -

"Man has not yet evolved an inch from the primordial slime that spawned him." Mark Blankfield, Jekyll & Hyde... Together again

Holley Carb thread
zeus87gn is offline   Reply With Quote Quick reply to this message
Unread 06-30-2012, 02:39 PM   #3
Jax89Jeeper
Registered User
1989 YJ Wrangler 
 
Join Date: Mar 2011
Location: Jacksonville, Florida
Posts: 345
Looks like the plug was ran a bit rich, and leaned back out... Maybe still running a tiny bit rich as the carbon build up is a bit high on the ceramic. Try running them another 100 miles or so and check again, the carbon will burn off over time if you are not running rich. This could also be that the plugs are not the proper heat range, a hotter plug will burn off the carbon fater. If the carb is adjusted correctly and you use the stock range plugs, you will have very little soot and a light brown tint on the insulator. Google "plug chop" and look at some photos and do a little reading. As long as the plugs aren't fouling you are in the ballpark and will run decent, you just might hurt gas mileage, worst case it will shorten the life of the cat and fail emissions testing.
Jax89Jeeper is offline   Reply With Quote Quick reply to this message
Unread 06-30-2012, 09:27 PM   #4
laybackman
Bikini Bridge Inspector
 
laybackman's Avatar
1995 YJ Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,273
Quote:
Originally Posted by zeus87gn View Post
thats normal ignition to me
I agree with zeus87gn. For a carb'd vehicle that is as old as yours they look fine to me also.
__________________
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)

If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!
laybackman is online now   Reply With Quote Quick reply to this message
Reply

Tags
carb , spark plug , timing

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.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

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.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.