I was hoping to hear what other people are getting for current gas milage. I currently have quite a problem on my hands, my 01 with 3.55 and only 30x9.50's is getting 11 MPG. I drive like grandma, and most of the driving is going at least 45 to 60. I have a bored TB but it didn't affect gas milage at all. I checked both before and after installing and It didnt change one bit.

Recently I replaced the gas cap because there code was coming up and I was told that a stripped gas cap could possibly be the problem. I havent had any other codes and both the Cat and the Muffler were replaced back in Sept. It also recently got a fresh air filter. I am currently at 34 psi for the tires also.

I have to find a way to get better milage, or else I will have to sell my jeep . Anybody have any ideas?

 

lucas injector cleaner, and try replaceing the o2 sensors

 

I just started adding lucas last week, forgot to say that. Looks like 02s are the next on the list.

 

Not sure how to help....I would maybe get a Scangauge on it and monitor TPS and gallons per hour. I think you have done all the normal things...tire pressure, gas cap, basic maint on the jeep. Is there any drag....brakes? Again not sure how to help?

 

I get between 15 and 17 but thats all city driving so far til I can get to the trails. I've got 31x10.5, not sure what gears are in it. Maybe the e-brake is dragging a bit? Did you try running injector cleaner through it? Something seems really wrong.

 

I dont think the Ebrake is dragging, I use it often and make sure that its completely down before I move the vehicle. I have been in a car where someone drove with the E brake still on and I know what it feels like, I havent experienced that at all.

I just put 10 oz of Lucas Injector cleaner through it. As in from the time from my last post to now I put 10 oz in.

I am a couple steps away from taking it a mechanic and let them look it over to see if they spot anything cause I cant see anything.

I know this time last year I was going 2 weeks without filling up, and I still make the same drives and I can barely get a week or less out of a fill up.

 

i have the same problem but i know that my O2 sensor needs to be replaced.

 

I'm wondering if its the MAP sensor, my old caravan was guzzling gas like crazy and it turned out to be the MAP. Replaced it and was back to normal.

 

Also a good tuneup can go a long ways with helping the jeep run better. I would definitely make sure you rear brakes aren't dragging as well.

 

Trade it in for a PRIUS

You drive a BRICK on wheels!

 

I know, and i love her, but seeing people get 15+ with bigger tires, gears and lifts is sad. I cant keep using it as a dd if im only getting 11 and I have yet to do any mods to really hurt the MPG

If there is a way to check the MAP id love to hear it, and me and my father will check the rear brakes tonight.

What other ideas do people have for a tune up? I though I covered most of them. I can try fuel filter, plugs, and IDK wat else.

 

change the spark plugs

 

tune up, and check the O2 sensors...

 

I would suggest a tune up (plugs wires and cap) change the 02 sensor and do a sea foam treatment. I did all that and am getting like new gas milage. 19.33 miles to gallon on last tank. 148,000 miles on motor (stock vehical).

 

its a 2001... so no cap or wires.. just plugs