329 miles on a 20 gallon tank = 16.24 mpg. That's with a fresh rebuild (5k ago). I would like to see how a 99+ intake, neon injectors and a good cone air filter would do.

 

You don't want to measure your MPG on the size of your gas tank, since I doubt you run your tank dry and get the Jeep towed to the gas station every time you need a refill. Instead, measure it on how much gas you put in the tank from empty to full. Most people have between 3 and 6 gallons left in the tank when they go to fill up. I go to the gas station when the Jeep starts to stall and studder around sharp turns. I usually fill up with 18 gallons.

 

to be honest, there was no real reason that i changed the TPS other than it most likely had not been changed. i read somewhere on here that they do go bad, and not always fail completely, so i figured since it was a quick cheap replacement, i would start there.
i also plan on going through the other sensors and replacing them as time and money allow.
i figure if i know what has been recently replaced, if something does go haywire, then it will be easier to narrow down the possible culprit.

i run rotella t6 5W40 synthetic, champion copper plugs, 87 or 89 octane gas from speedway, and every 3rd tank or so i will run an injector cleaner in the gas.

aside from a 2" lift, 30x9.5 tires, 2 driving lights on the bumper and a code 3 light on the roof, everything is stock...

i was a little dissappointed with my gas mileage so i decided to be proactive rather than reactive with maintenance....the tps was just the start.
i think that perhaps tightening the bolts on the throttle body may have done more than the tps. hard to say.

i have a multimeter, although i don't know how to use it....and i have my old tps.
anyone have any tips on checking it? i'll post the results.

 

A little off topic... but what Code 3 light do you have on the roof? I've got an MX7000 on my roof.

 

i'm currently running the code3 force 4 lp beacon....thinking about modernizing a bit though and going with something newer...been trying in vain to find a new lens for mine since it has some cracks and is kinda foggy.

 

Nice.. that shouldn't look too bad atop of a Cherokee. For the wind burnt lenses, try some of that headlight restoration stuff they sell at autoparts stores. That should help, if not cure that issue.

 

what the heck! I might be getting 400kms to 75 liters.....or 250 miles to 20 gallons!

my first tank I was able to get 16mpg but now it doesnt seem like it, although I did put the 31s on

 

OP did you get the sensor from the dealership? or did you go with a store brand.

this is what I found from advance auto parts store

http://shop.advanceautoparts.com/web...S_547260685___

 

I'm running pretty close to stock and I avg 16-19mpg. Once my service is done here soon, I'll post a few tank fill ups to see if TPS helps.

 

my 2000 xl, 4.0L 4.5"lift with 32's stock gearing gets 15mpg. i guess thats not to bad based on others with stock vehicles but i would love more. I am also interested how do i calibrate the ODO? ive been told a dealer can set tire size and calibrate it for correct ODO and shift patterns?

 

I'm pretty sure you have to get a sensor that goes in the transmission that reads how fast your gears are turning. I haven't heard of being able to take it to a dealer and them just "retune" it i guess you could call it. I could be wrong though.

 

Not on latter models, you just need a scanner that can set the pinion factor....if I can get my snap on brick to communicate with my 2000 I will see if it is capable of doing it.

IU know that my scanner can do it on chrysler mini vans but I will see about my cherokee

 

stock gears... 31's.... just got back from 400 mile trip to drop gf off at her niece's... 17.8 mpg ran 70-72 mph.. for 385 of the 400... so thats not to shabby... I bet if i ran 55 i would have got 20....

 

repair, lemme know how that goes because I'm runnin 33's on a 98 and am tired of doing math on the fly

 

Change out the speedo gear. It's mounted on the TC. Takes all of about 5 minutes. Quadratec has them for $39.99. They also have a chart to determine which one you need - http://www.quadratec.com/jeep_knowle...article-46.htm