I dont know if its the same issue I had and dont know the part but there is a senson on the fly wheel that was bad on mine and I replaced it and Im back up to over 350 a tank

 

I have what in my sig. I get about 175 per half and I baby it too. Shift @ 2k rpms. Once in a while ill get on it, but that's because I love to hear my exhaust.

Now what's this additive to offset the ethanol added to the gas in the winter. Id love to try it.
Also with my 235's I'm reading about 19-20 mpgs. Even withthe new injectors. I have 3.55 gears too.
What do you guys think my actual mpgs are??? I have to get a new gear thingy.
Not tryin to jack op's thread... sorry. Just wonderin.

 

I'm on the same boat.. I get 200 at most and mine is mostly stock and its a 2wd.. it sucks AND I drive like a granny

 

can anyone recommend a good tune up kit?

 

I got mine from summit. I still need a coil though.

 

which one do you prefer, omix, mallory, accel....?

 

Is everyone comparing the 4.0 auto? If not then this is just ramble. I have a 90 4.0 renix auto with 250k and hard starting. 7" lift and 35" muds with 4.56 gears and I get 250 miles plus from a tank.

I do have exaust and intake done.

If you run bigger than stock tires then your mpg will be crap without a regear to give the motor the advantage over the tires. 33" tires and 3.07 gears is the problem.

 

easy solution, get smaller tires... I love my jeep. I get 20 with stock tires

 

I drive mines like a stole it most of the time and I get roughly 250 on a tank with 31s.

 

You probly oughta replace your O2 sensor while your at it.

 

I get close to 200 per tank, I have a 3.5 inch lift with 31s and stock gears. Changed 02 sensor, plugs, fuel filter. And I do get on it sometimes.

 

135 all stock. Something wrong it was 400 ish over the summer

 

what i replaced so far: spark plug coils(the spark plugs looked fine and were gaped to .035), distributor cap, rotor, air filter, transmission fluid, and oil. And still getting same results, 5-7 miles per gallon

FYI, i have 3.55 gear ratio
AND I DRIVE LIKE AN OLD MAN; i try to keep it under 2000rpms

 

i get 280 to 290, 3" on 32's, 5-speed roof basket with lights and a spare on top and i drive like an *******

 

These threads don't tell much about anything, miles per gallon will tell you something, but miles per tank or miles per half a tank could be just a messed up fuel gauge or a messed speedometer gear. Is a half a tank 8 gallons or is it 11 gallons? Makes a big difference.