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Unread 07-21-2011, 10:24 PM   #1
Flipcyd7
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2000 TJ Wrangler 
 
Join Date: Jul 2011
Location: Pittsburgh, PA
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Improve mpg..

Its a Jeep..I know that, but what are the most efficient mods for improving mpg. I have a 2000 TJ Sport 4.0 I6. 33 12.50s and 3in lift. Thought about K&N cold air intake but because of this site have decided against. Already have Poweraid TBS installed. Any tips are appreciated. First time Jeep owner but will own nothing else ever.

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Unread 07-22-2011, 12:44 AM   #2
Boodyrider
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1997 TJ Wrangler 
 
Join Date: Feb 2008
Location: Maryland
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Short answer: buy a daily driver that gets good fuel economy. Prius comes to mind. Otherwise, put Jeep back to stock and do a tune up. Throw away the TBS.
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Unread 07-22-2011, 12:59 AM   #3
neatocj
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Similar to what ^said....the best mod for a jeeper to get better mileage is to not drive it.

that or have small tires, keep the top and doors on and be nice to the skinny
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Unread 07-22-2011, 04:39 AM   #4
hdsport
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My 2000 TJ

I have a 2000 TJ, 4.0L, 5-speed, stock 3.07's, 235's, 105,000 mi and all stock.
I get 18-20 mpg all of the time. Got better until they mandated 10% ethanol in gas.
Compared to what I see on this Forum, this is pretty good mpg's.
I don't put my foot in it or do anything stupid as I drive. She treats me good, I treat her good.
No K&N, throttle body spacer, etc.
Today, a new power steering gear....can't stop the current leak.
Was 102 deg F yesterday, more today...can't wait to do some doors off touring today.
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Unread 07-22-2011, 04:23 PM   #5
soldierofchrist77
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Bigger tires without matching gears will greatly decrease gas mileage. Were your gears upgraded with your tires? You should be running at least 4.10s with your 33s.
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Unread 07-22-2011, 04:53 PM   #6
t-fids
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Best advice I was given was don't drive anywhere fast. Mine's a 98 4 cyl 2.5L with 33's and 4.10's. It's a jeep and we all know they mall crawl, so, in saying that, sport the mall crawl! Don't go anywhere in a hurry, if it's stick, shift at an economic RPM. I'm surprised with my $60-70 tank (CND), that it lasts me 7-9 days.
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Unread 09-09-2011, 03:07 PM   #7
chopstix333
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I'm with t-fids... I also got a 98 2.5L on 33s and stocks gears and easing off the gas can save some $$$! Besides, you got a lift and big tires.. no one can bully you on the road.. so driving slower than traffic ain't gonna hurt ya
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Unread 09-20-2011, 08:07 AM   #8
GromMudder757
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i run the speed limit, and i dont speed in my jeep ever. I get 20 mpg with my setup 2.5l 4.5" lift, pro comp 33s. First thing first replace ur fuel filter!!! makes a big difference! i also shift at 2000 between every shift! keep ur right foot out of it
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My first jeep - 1992 YJ, 2.5, 5 spd, Rough Country 4.5" suspension lift, Brush Bar, 33x12.50 Dakota ATs, Uniden 510 cb
My mom, and brother have really helped me a lot with this project, if it wasnt for them my jeep would be in peices!
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Unread 09-20-2011, 10:01 AM   #9
t-fids
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Quote:
Originally Posted by GromMudder757
i run the speed limit, and i dont speed in my jeep ever. I get 20 mpg with my setup 2.5l 4.5" lift, pro comp 33s. First thing first replace ur fuel filter!!! makes a big difference! i also shift at 2000 between every shift! keep ur right foot out of it
Grom, any fuel filters to recommend? Also, how expensive and can you do this yourself? What kind of differences have you noticed?
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Unread 09-20-2011, 11:55 AM   #10
sequimbillyheep
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13.4MPG on my 97. I run 4.56s and 33s, 35s off road. Im not complaining about my MPG, cause i expect it.
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Unread 09-20-2011, 01:27 PM   #11
sgtmajor138
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Right at 17 mpg with 4.0L, Auto, stock gears, 33s, and a fresh set of plugs. The fresh plugs helped a bunch.
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Unread 09-22-2011, 10:02 PM   #12
GromMudder757
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1992 YJ Wrangler 
 
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I use the napa gold series it cost me 12.97 on my shop acc with them and it made a huge difference. I recommend doing a tune up on the regular because the plugs tell the story of the motor. That's all there is too it, you have to read the plugs! I got 22.3 mpg on the highway today I was excited
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My first jeep - 1992 YJ, 2.5, 5 spd, Rough Country 4.5" suspension lift, Brush Bar, 33x12.50 Dakota ATs, Uniden 510 cb
My mom, and brother have really helped me a lot with this project, if it wasnt for them my jeep would be in peices!
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Unread 09-22-2011, 10:39 PM   #13
Drix
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I notice a lot of people buying Throttle body spacers... DONT! for the love of god and physics dont do it. Throttle body spacers came from Carbs, they made the carb sit up a bit higher allowing fuel and air a bit more time to mix. kinda like putting on a taller intake.

Unless you Have a TBI set up you could make out. on modern EFI engines where fuel is injected through the rail and into the manifold your not gonna have any effects.

The only way to increase your MPG will

1. Control the foot that pushes the skinny pedal.
2. Keep up on regular Maint.
3. Buy small cheap old 4cyl DD (This is what I did) Plus I paid less for the Corolla then what it will cost me to replace my tires after they wear away on the pavement.
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Unread 09-23-2011, 08:48 AM   #14
GromMudder757
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Quote:
Originally Posted by Drix View Post
The only way to increase your MPG will

1. Control the foot that pushes the skinny pedal.
2. Keep up on regular Maint.
3. Buy small cheap old 4cyl DD (This is what I did) Plus I paid less for the Corolla then what it will cost me to replace my tires after they wear away on the pavement.
hahah i agree 100 percent! I bought a 88 zuk sami for 500 runs drives inspected!! Only 2 small rust spots, 9" lift, 33s, 5 speed, no exhaust, 24.6 mpg if im easy on it!!
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My first jeep - 1992 YJ, 2.5, 5 spd, Rough Country 4.5" suspension lift, Brush Bar, 33x12.50 Dakota ATs, Uniden 510 cb
My mom, and brother have really helped me a lot with this project, if it wasnt for them my jeep would be in peices!
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Unread 09-30-2011, 03:50 PM   #15
TLATEOTW
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Location: beirut, beirut
Posts: 10
try using scangauge II, to monitor your current MPG, it'll help.
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