Spark Plugs
#1
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Year: 1992
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Engine: 4.0L I6
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I am a new Jeeper and looking to replace my spark plugs. Ive been getting roughly 13 mpg and pretty low acceleration. I have 30" BFG all-terrains, and I understand bigger tires = less power.
What spark plugs do you seasoned veterans find provide increased perforance? I'm not looking for anything crazy, just some decent spark plugs.
Also, what else have you done to increase your mpg with bulky tires?
Extra Info: I drive a 1992 XJ w/ 4.0L I6. 138,000 miles.
What spark plugs do you seasoned veterans find provide increased perforance? I'm not looking for anything crazy, just some decent spark plugs.
Also, what else have you done to increase your mpg with bulky tires?
Extra Info: I drive a 1992 XJ w/ 4.0L I6. 138,000 miles.
#2
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Year: 1998 Sport
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I am a new Jeeper and looking to replace my spark plugs. Ive been getting roughly 13 mpg and pretty low acceleration. I have 30" BFG all-terrains, and I understand bigger tires = less power.
What spark plugs do you seasoned veterans find provide increased perforance? I'm not looking for anything crazy, just some decent spark plugs.
Also, what else have you done to increase your mpg with bulky tires?
Extra Info: I drive a 1992 XJ w/ 4.0L I6. 138,000 miles.
What spark plugs do you seasoned veterans find provide increased perforance? I'm not looking for anything crazy, just some decent spark plugs.
Also, what else have you done to increase your mpg with bulky tires?
Extra Info: I drive a 1992 XJ w/ 4.0L I6. 138,000 miles.
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Originally Posted by gasouthernxj
I am a new Jeeper and looking to replace my spark plugs. Ive been getting roughly 13 mpg and pretty low acceleration. I have 30" BFG all-terrains, and I understand bigger tires = less power.
What spark plugs do you seasoned veterans find provide increased perforance? I'm not looking for anything crazy, just some decent spark plugs.
Also, what else have you done to increase your mpg with bulky tires?
Extra Info: I drive a 1992 XJ w/ 4.0L I6. 138,000 miles.
What spark plugs do you seasoned veterans find provide increased perforance? I'm not looking for anything crazy, just some decent spark plugs.
Also, what else have you done to increase your mpg with bulky tires?
Extra Info: I drive a 1992 XJ w/ 4.0L I6. 138,000 miles.
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Originally Posted by RTorrez1
The best plugs for our 4.0 is the Champion copper top plugs gaped at .035. Don't use bosch or any of those fancy plugs the only cause problem on our Jeeps.
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Originally Posted by RTorrez1
You are correct. If I am not mistaken. Standard is Champion for 99 and older and NGK for 2000 and 2001 Both gaped at .035
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Year: 1998 Sport
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Yeah I did try the Bosch platinum and they lasted for less then a week for me and that was maybe 25-30 miles only. My 98 ran so bad I went back to the champion and never had a problem with them. Some people have had good luck with the fancy plugs but I never did at least in any of my Jeeps.
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#11
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Originally Posted by cjfrigo
What should I run in my 2000 4.0 champion copper plus or e3 plugs ? I keep hearing different opinions?
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Year: 2000
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