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Old 10-02-2010, 10:34 AM   #1
Join Date: Jul 2009
Location: West Michigan
Posts: 3
Which spark plugs?

I have an 88 Wrangler YJ with the 258 and the Weber carb upgrade. I did the nutter bypass and also installed an HEI distributor. I am having a very difficult time with the timing. If I set it to where it runs perfect, idles perfect, has the power back, it spark knocks at higher speeds. If I retard it to get rid of the spark knock, the idle goes away and the low end power goes away. I am still running the stock recommended spark plugs. With the HEI distributor and the nutter bypass, I am thinking that I should also be running with different spark plugs right? If so, what are recommended?


First time Jeep owner
88 Wrangler YJ
2.5" Lift
New 4.2L crate motor
31" MT Baja Claws
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Old 10-02-2010, 07:26 PM   #2
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Join Date: Sep 2010
Location: ft polk
Posts: 18
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auto lights in my experience always run good in jeeps i went platinum in mine stear clear of Bosch
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