walkerja191
NAXJA Forum User
- Location
- Rochester, NY
I have a '94 Cherokee sport 4.0 with a 4 inch lift. I have tiny tires on it right now for the winter and I am only getting 13 mpg. Does anyone have any idea what could cause this?
X2Thats some crappy gas mileage... Check your air filter, plugs, wires and coil. I just did a tune up on my 96 XJ and replaced all of 'em and I am getting 20 on the highway and 17 in city. Of course my Jeep is totally stock at the moment so that prolly makes a bit of a difference.
oh yea, when was the last time you changed your o2 sensors?
Thats true, if you do a lot of around town driving, and lots of short trips where the engine is basically just trying to warm up the whole time, then 13mpg would be normal. Highway is a different story tho.13 MPG on short trips around town in the winter and warming it up a little would be totally normal.
I would say that's because of the 80mph speed. Slow down to 60-65mph (i know, it sucks) and you'll get your fuel economy back. XJ's have the aerodynamics of a brick. If your O2 sensors were bad you'd be getting closer to 10-13mpg. Usually, they don't show up with a code, but if you can read live data, a bad O2 sensor might read lean.Just tested my stock 2000. Slightly disapointed at 18 MPG at sustained (3 hour) 80MPH drive. I expected about 20. I did have a 5 or 10 minute warm-up included in that though, but I think that's just an excuse. This vehicle is new to me and I probably need to test the O2 sensors. Should bad O2's show up with a code reader?
I just read in OEM tech that a gentleman had a loose connection on his temp sensor causing his Jeep to stay in open loop mode. Not allowing the engine to use the O2 sensor to adjust air fuel ratio.
I would say that's because of the 80mph speed. Slow down to 60-65mph (i know, it sucks) and you'll get your fuel economy back. XJ's have the aerodynamics of a brick. If your O2 sensors were bad you'd be getting closer to 10-13mpg. Usually, they don't show up with a code, but if you can read live data, a bad O2 sensor might read lean.
keep in mind youre driving cinder block on wheels. Heres what I got, not sure if you want to throw money at this stuff.I am only getting 13 mpg. Does anyone have any idea what could cause this?
i have a 98 with 5" of lift 31" tires 4:10 gears and im getting 21 mpg!