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Discussion Starter · #1 ·
Im averaging 12mpg anyway to get to 15 or 16 mpg.

I have a kn intake superchips programmer set on 87 performance
411 gears 35" tires and auto

any ideas
 

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That might be about right. those 35s have a lot of rolling resistance. Otherwise it could be an O2 sensor starting to go bad. Sometimes they won't throw the code right away. But I suspect it's just the low side of normal. Also what type of driving? Mostly city? Especially with 4.11 and 35s with auto. You should really be geared at least 4.88 I think.
 

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I'm just gonna take a shot in the dark here but I think your problem could be having 4.11 gears and 35" tall tires on a rolling refrigerator.
 

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12-13 DD is what I get.........
 

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Thats actually pretty normal for that tire size and gearing on a TJ. It's not like it's an aerodynamic marvel.
 

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I think 12 is good for what you're running :wavey:
 

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I get about 15mpg with 33's and 4:56 gears. Make sure your odometer is right or your numbers may be off.
 

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Make sure your odometer is right or your numbers may be off.

That's a very good point. Why didn't I think of that? :doh:

Your programmer should be able to adjust it for you if you haven't already done that.
 

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35's, my friend. That much rubber along with the fact the Wrangler has the aerodynamics of a brick, well.....you're not going to get much better than 12. It's kinda that you can't have your cake and eat it too, thing.
 

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35's, 4.10s, and 6spd here and Im getting about 12-13 on average but much less if I do alot of city driving or let the Jeep warm up for some time before jumping in.
 

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Regear.. Should help
 

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mine is really bad i have a stock everything and im getting like 10mpg. how many 02 sensors are on a 01 sarah? does anyone know?
 

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^^HAHA!!^^ I just instictively tried to kill the bug in your signature!!
 

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mine is really bad i have a stock everything and im getting like 10mpg. how many 02 sensors are on a 01 sarah? does anyone know?
I always thought there were two - one upstream of the cat and one downstream. I think on Cali emissions Jeeps there could be two each way for a total of four. Don't quote me though.
 

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My 01 had at least 4 and someone had told me there was a 5th but I never checked for that one
 
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