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Unread 06-02-2012, 12:39 PM   #16
CKjeeps
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Sounds like time for a v8 swap.

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Unread 06-02-2012, 12:56 PM   #17
b_a_mech
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1994 YJ Wrangler 
 
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What exactly are we talking about here?? Good gas mileage?? Is there such a thing in a Heep?? I did just do the mpg check though. I stopped and got gas when it read 265 and put 18 gallons in my 20 gal tank. So that's 15 in my book (14.72). I rum 35's on my 94 YJ with 4:11 gears ax-15 5spd. If we really wanted good gas mileage I think we would all be driving a Prius...lol. Happy trails
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Unread 06-02-2012, 12:59 PM   #18
WindsorRenegade
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Quote:
Originally Posted by b_a_mech View Post
If we really wanted good gas mileage I think we would all be driving a Prius...lol.

Speak for yourself


Last time I checked, I was getting 14mpg, mostly city. Everything is stock, 4.0, but I have to do my plugs&wire soon. So that should help...a little.
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[QUOTE=ruthole;13615845]I just bumped it around till it was in the hole and she went right in. But my hands were hard to fit in there. [/QUOTE]
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Unread 06-02-2012, 01:09 PM   #19
b_a_mech
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Quote:
Originally Posted by WindsorRenegade

Speak for yourself

Last time I checked, I was getting 14mpg, mostly city. Everything is stock, 4.0, but I have to do my plugs&wire soon. So that should help...a little.
Hey mine is all city! Hahaha and urs is stock and that's all your getting something's gotta be wrong! Maybe you need a Prius! Lol
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Unread 06-02-2012, 01:11 PM   #20
sd92110
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1988 YJ Wrangler 
 
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Thanks people I don't feel so bad now!
I thought maybe something was really wrong with it..
I am keeping the rack.
I have a toyota truck for work my jeep is for weekends and camping trail rides ext.
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Unread 06-02-2012, 01:12 PM   #21
rodgers3
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Quote:
Originally Posted by crackedcornish
Jeep ..good gas mileage?
Right
Were lucky to see 17 on a good day
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Unread 06-02-2012, 01:16 PM   #22
WindsorRenegade
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Quote:
Originally Posted by b_a_mech View Post
Hey mine is all city! Hahaha and urs is stock and that's all your getting something's gotta be wrong! Maybe you need a Prius! Lol
EN OH spells NO! I'll walk thanks I'd probably get a Focus or something if I were that concerned about it....Prius? BLECH!

Actually...according to the site posted earlier, I'm not too far off. http://www.fueleconomy.gov/feg/noframes/8492.shtml
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[QUOTE=ruthole;13615845]I just bumped it around till it was in the hole and she went right in. But my hands were hard to fit in there. [/QUOTE]
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Unread 06-02-2012, 03:29 PM   #23
plym49
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My 4.2 YJ with the stock Carter BBD carb (not Nuttered!) with 31" tires, stock gears, and an AX-15 gets 17 to 18 around town. I can pull 20 on the highway at 60 mph. The worst I have ever gotten was 15, and that was at 75 mph pulling a loaded M416 trailer on very hilly Interstate.

Of course, all of the usual suspects are correct: timing, tire pressure, 2WD, no extended idling (gets you 0 mpg, just shut it off), O2 sensor, good cat, etc.
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Unread 06-02-2012, 08:29 PM   #24
SeansYJ
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Have you considered your actual miles. On an F-150 I had with 32's on the interstate at every mile marker my odometer only rolled .8 miles. By my calculations using your 172 miles and MY known odometer error that would have been 206.4 actual miles. With your 15 gallons that WOULD bring it up to 13.76 mpg. As always your mileage may vary (pun intended). Anyway, it's just a thought. Obviously if you've corrected your speedo for yor tires this doesn't apply.

Sean
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Unread 06-02-2012, 08:50 PM   #25
wrngleryj
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I have '94 4.0 HO with 31's and I average 17.

Go to a local gas pump and fill up til it kicks off..then reset ur trip meter.. Drive around a few days or however long.. Go to the same pump and fill up again.. Divide the number of gallons it took to fill it back up into the number of miles u traveled since last fill up and that is ur average mpg..
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Unread 06-02-2012, 09:01 PM   #26
Pragmaticdoc
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Wait you are getting 15 mpg? What are you and the Jeep Gods doing behind closed doors? 87 YJ 4.2 5 spd 33's 3 inch body with a weber and K&N filter. I get ten mpg if i go downhill the whole tank with a very strong tailwind.
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Unread 06-02-2012, 10:12 PM   #27
plym49
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Quote:
Originally Posted by Pragmaticdoc View Post
Wait you are getting 15 mpg? What are you and the Jeep Gods doing behind closed doors? 87 YJ 4.2 5 spd 33's 3 inch body with a weber and K&N filter. I get ten mpg if i go downhill the whole tank with a very strong tailwind.
Who knows how that Weber is set up? I am running the stock carb because the factory knew how to jet it. I am also still running the feedback circuit (optimizes a/f mixture based on information from the O2 sensor) so, once warmed up, the engine is more likely to be running at stoich.

Also, is your ignition advance set properly and do you have the right advance curve? Your 33s will sap more power than my 31s, but I'd hazard a guess that your ignition and fuel could be dialed in to produce better numbers.
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Unread 06-02-2012, 10:19 PM   #28
sd92110
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Anyone put an all electric engine in a jeep?
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Unread 06-03-2012, 12:28 AM   #29
baritone_mike
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Quote:
Originally Posted by sd92110 View Post
Just calculated my gas mileage at 11-12 miles per gallon, OUCH!
4.2l 6 cylinder 5 speed manual transmission.
Gov. site says it should be 15 city 20 hwy.
I have a rack on it but whoa..
172 miles on a a full 15 gallon tank of fuel...
Anyone wanna buy a Jeep??

Any Ideas??
2.5/AX-5 swap, 4.10 rear end and some 33's. I got 15.7 mpg last tank.

Did you do math for the tire size difference?
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Unread 06-03-2012, 10:06 AM   #30
rodgers3
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Quote:
Originally Posted by sd92110
Anyone put an all electric engine in a jeep?
There to small to store the batterys needed I belive....
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