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Unread 03-25-2013, 08:15 PM   #1
NateT
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1986 CJ7 
 
Join Date: Feb 2011
Location: Folsom, CA
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Time to start the hacking away at the jeep to-do list, first up smog

I am trying to do my pre-smog work, pulled my plugs and they look like crap. I have uploaded a few pics, This is on a 258. Spark plug is half black/half white and the black portion is chunking off. I have looked inside the spark plug cylinder and do not see any coolant, possibly running to lean? How do I tell?

img_0086.jpg   img_0087.jpg   img_0088.jpg  
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Unread 03-25-2013, 09:00 PM   #2
Crisco87
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I thought thick black meant it was running rich? If they were clean that would mean lean...???

I'm still learning all this so I could be completely wrong.
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Unread 03-25-2013, 10:15 PM   #3
HiGrnd
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white spots and build up mean lean black can be caused by several things....rich, to oil in the blow by gases getting into the combustion chamber, etc.
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Unread 03-26-2013, 02:14 AM   #4
John Strenk
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Don't forget the 258 manifold sucks and some cylinders will run rich and some run lean if the manifold heater is not working.
Also how you do the plug test is important. IF you want accuracy, you need to start with new plugs and see what happens after a run.
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Unread 03-26-2013, 05:04 AM   #5
86cj74.2L
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These are good looking plugs.
image-3578887844.jpg   image-3560328685.jpg  
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Unread 03-26-2013, 02:44 PM   #6
NateT
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I put new plugs in last night, I will look at them when I get home, I actually passed the smog test but still want to get this issue cleaned up.
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Unread 04-04-2013, 10:30 AM   #7
NateT
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I drove around for about a week and it started running real bad, wont go over 30mph. Pulled the plugs again and they looked like below. Still burning half black and half white. My thoughts are that after a few months they will start getting really bad again.
img_0089.jpg  
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Unread 04-04-2013, 11:55 AM   #8
NateT
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Driveline snapped on my test drive after to checked all the plugs and made the the cables were connected, guess I will worry about this problem later. One note to all new jeep owners, when you test drive your jeep in the rain, carry you cell phone so can call for a ride home.
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Unread 04-04-2013, 12:15 PM   #9
walkerhoundvm
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Only in the rain?
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Unread 04-07-2013, 05:00 PM   #10
86cj74.2L
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When I met my wife and started wrenching on her moms CJ it took 5 years to work all the bugs out.

Biggest help was fixing vacuum leaks. Learning what the BBD needs to be happy and taking control of the spark.
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Unread 04-09-2013, 08:21 PM   #11
NateT
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Drive line fixed and lengthened. Was not as costly as I thought. Runs pretty good now.
img_0192.jpg  
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Unread 04-15-2013, 06:27 PM   #12
NateT
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took the top off today and of course we got an unexpected storm. Going to try the Nutter bypass tonight since I just passed smog and wont have worry about it for 2 more years. Hopefully I dont run into any issues down the line because CA is so strict. Jeep is not running good at all, went from blowing white smoke to just being sluggish at low RPMs. I did a compression check and it between 123-130. I was impressed.
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Unread 04-15-2013, 09:46 PM   #13
JeffreyCharles
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Heh, I took mine off a couple weeks ago - right before all the storms we had. Wet seats every morning. Didn't care in the least (especially on the days my wife had to drive it to work because I had long distances to travel)! Yours is way too new, and has much fancier stuff on it smog- and carburation-wise than mine. So I can't be much help there beyond saying that you should tune it up to the specs, ensure there aren't any vacuum leaks, carb is rebuilt, smog gear is working correctly, etc. We have a cross to bear out here in CA and written on it is CARB. :-)
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