what spark plugs are you running? post up
02-25-2012, 06:15 PM
#1
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Year: 86
what spark plugs are you running? post up
looking to see what different plugs people are running.
state the year jeep and plug number, don't just say champion as there are many different champion plugs that can be used. thanks
state the year jeep and plug number, don't just say champion as there are many different champion plugs that can be used. thanks
02-25-2012, 06:39 PM
#4
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
NGKs in all 3 of my Renix Jeeps.
02-25-2012, 06:43 PM
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Year: 1999
Model: Cherokee
Engine: 4.0 stroked to 4.6, Thanks to Teasdale'sMachine!
Before we put the hesco head on, we ran the ngk. After the head install, we tried the E3.48 plugs. With these, I kept getting an engine light. So back to the ngk with no problems since.
02-25-2012, 06:54 PM
#6
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Year: 1999
Model: Cherokee
Engine: 4.0
87-99: Champion coppers
00-01: NGK coppers
30k intervals.
02-25-2012, 06:55 PM
#7
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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02-25-2012, 08:07 PM
#11
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Year: 1999
Model: Cherokee
Engine: 4.0
'99 XJ, 4.0
Ran Champion RC12ECC plugs for years with no problems. I thought I would try the NGK ZFR5N 3459 plugs and see what, if any, changes occur. They've only been installed for about 150 miles now with no difference in performance. Pulled one the other day for a look-see and it looked good, so on with the show.
Ran Champion RC12ECC plugs for years with no problems. I thought I would try the NGK ZFR5N 3459 plugs and see what, if any, changes occur. They've only been installed for about 150 miles now with no difference in performance. Pulled one the other day for a look-see and it looked good, so on with the show.
02-25-2012, 09:00 PM
#13
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Year: 1998
Model: Cherokee
Engine: 4.0L
Jeeps love Champion/Autolite/NGK copper plugs. Copper being the key. I've tried the Bosh 2 and the Bosh 4 and the Jeep didn't like them.
