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View Full Version : 4.2L tune up


coyote
04-29-2006, 03:46 PM
Just ready to do a tune-up on my YJ, have a question for you guys, I always use bosch platnum sparkplugs, however I have not used them on the 4.2 as I have heard they give sub-standard performance.
Any have any experience using them?

Nutbar
04-29-2006, 04:10 PM
Hey Bill

I have always just used NGK plugs on my stuff never bothered to try the Platinums

Smurf131
04-30-2006, 02:14 PM
i never thought there was much of a difference, spark is spark, i think it comes down to how fast they wear out. i've tried them both and found almost no difference.

bakelite
04-30-2006, 03:26 PM
Hey Bill

I have always just used NGK plugs on my stuff never bothered to try the Platinums


I agree, too much hype about plugs.

coyote
04-30-2006, 05:00 PM
Thanks, I only used NGK plugs once in a ford 289 and pulled them out after a week.
Will give them another try though, Mike do you use the v-grove or just the normal ones

Explorer guy418
04-30-2006, 07:18 PM
yeah NGK all the way, the 4.2 sucks anyways:D

Nutbar
04-30-2006, 08:43 PM
Yeah I use the NGK v grooves in my stuff never had any complaints with em.

coyote
04-30-2006, 09:07 PM
Thanks will give em a try
I love the 4.2L I am sure to never get a speeding ticket when driving my jeep.

Explorer guy418
05-01-2006, 07:51 AM
man i no the 4.2 isnt very good but i can get my 33s turning good and ripping down the road get goin goood fastest like 120

coyote
05-01-2006, 01:08 PM
I think the only way mine could see 120 km is if I drove it off of a cliff

UU
05-01-2006, 02:49 PM
I think the only way mine could see 120 km is if I drove it off of a cliff


O.K. [f]

Mr Vic
05-01-2006, 03:26 PM
I think the only way mine could see 120 km is if I drove it off of a cliff

no kiddin, i think my YJ hasn't gone that fast in the last 3-4 years.. the 4cyl 33's and 4.10 gears = slow lane [15]

coyote
05-01-2006, 04:12 PM
thanks Walt

Toy_Runner
05-02-2006, 08:57 PM
man i no the 4.2 isnt very good but i can get my 33s turning good and ripping down the road get goin goood fastest like 120

really a 4.2L that a straight 6 right, my little 2.4L 22r can get spin my 33's to a top speed of 120

pumpkin
05-03-2006, 06:37 AM
Bosch platnums are junk. I use a/c in my stuff or ngk platnum, or irridiams.