Daily driver 02 TJ with 4" lift and 31" tires... - JeepForum.com
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Unread 07-07-2010, 04:03 PM   #1
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2002 TJ Wrangler 
Join Date: Jan 2010
Location: Wetaskiwin, Alberta
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Daily driver 02 TJ with 4" lift and 31" tires...

I know what you are thinking... so I will start with the fact that I understand what the fuel economy is, and nothing is going to change that.

My issue is a lack of power. I know the TJ isnt a sportscar, but there is an overpass I take daily that scares me. Its at such an angle and there is so much traffic that it is hard for me to merge and get up to the flow of traffic.

What can be done to give my Jeep a little more 'oomph' on the highway?

I was thinking about a superchips or something like that... something that doesnt sound annoying and actually does a bit (the jeep had a airraid filter and throttle body spacer when I bought it... those came off the next day).

Do any of the 'programmers' actually work well for Jeeps, or well enough to warrant the purchase?

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Unread 08-24-2010, 08:21 PM   #2
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2001 TJ Wrangler 
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Location: Providence, RI
Posts: 236
have you regeared?
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Unread 11-29-2010, 12:58 PM   #3
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Location: colorado springs, colorado
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i have a 4 banger 98 TJ with 4.10 gear ratio with 31's.
its kinda slow getting into 3rd gear and drags when im going uphill.
i wanted more power originally, but my conclusion was who cares?
when merging into the traffic, people should have some common respect on the road and move aside.
and if someone hits my jeep.. who cares? ill put some better parts on it.
thats y i have jeep. you can do so much things on the jeep and prices are not too costly
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Unread 01-03-2011, 12:03 AM   #4
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2004 WJ 
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Location: Clarksville, TN
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I think the tires are your limiting factor for your speed. 31" are pretty big for a 4 cylinder. Have you considered going down a size or two, perhaps back to stock even? That will reduce the rotational weight the engine has to move, so it should return a little "ommph" back to you.
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Unread 01-04-2011, 09:23 AM   #5
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1998 TJ Wrangler 
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Location: Montreal, Canada
Posts: 1,259
sell the 4 banger get a 6cyl
'98 TJ Manual -2.5" rcx long arm on 31
'99 Xj, Stock on 30"
'86 Monte Carlo 357 stroker. 450hp.
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Unread 01-04-2011, 06:33 PM   #6
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4 banger

I've had my Jeep since 2000, its a '99 4cylinder with a 2" bb lift and a magna flow exhaust, ever since i've had the Jeep i've had 31x10.5's.
I drive highway and city and I havnt had any problems.
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Unread 01-10-2011, 11:33 PM   #7
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2000 TJ Wrangler 
Join Date: Mar 2010
Location: Columbus GA
Posts: 710
4" and 31s... The 4 cyl is not liking pushing your Brick that 4 inches higher with 31s. If you want lift, get a smaller lift? Or go get some tube fenders and run 0 lift? The 4in is hurting you IMO!
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