I have a 99 Cherokee Sport I6. The majority of my driving is non-highway. My jeep is mechanically sound with no after market modifications. I'm getting about 12 miles to the gallon. This seems pretty bad for a 6 cylinder but maybe it's standard for cherokees. Would a cold air intake make a difference?

Thanks,

Will

 

no, clean TB, clean the sensor on the TB, make check your exhaust make sure it's not cracked at the collector, check 02 sensors. injector cleaner

 

Na man, hardly at all honestly the best thing for you to do would be start off by changing the spark plugs and wires to ngk plugs. Then try the cold air intake after that

 

^x2

 

Like most have said... Sounds like its time for a full blown tune up (plugs, wires, TB cleaning, injector cleaning, air filter, fuel filter, etc.)

 

x3 on the tune up and cleaning the TB and sensors, how far is your drive, short? if your engine doesnt warm up completely by the time you get where your goin that would probly contribute

 

same here man, but i have a 3" lift and 31s

 

Yea, my commute is only 8 miles. What should I be getting for gas mileage?

 

The I 6 4.0 from Chrysler will range from 17 mpg to 11 mpg the cold air intake will give you about 1 mpg better.

 

more than 17 bro...

 

i just posted a thread for better mpg. I had the same issues, and got sick of it. I knew i could get better

Follow my steps and let me know....i went from 13-15 to 17-19
right now my calculated mpg is 17.1

winter blend fuel wont help
cold temps hurt it
short trips kill mpg

try my steps and let me know how you turn out

 

upgrade injectors, and just open lower part of the airbox up (airbox mod)

 

I agree completely, and yea 8 miles is pretty short but id think youde have that warmed up by then, mine was only about 2 miles and i was getting 12, but def cold weather doest help it

 

My 2.5 lit only gets 19 miles per gallon. My 94 wrangler with the 4.0 ho got 12 mpg both vehicles have 33 Inch tires 4.5 inch lifts 4.10 gears

 

^ if you would of had 4.56 or 4.88 gears your mileage would be higher