im getting 5mpg help
Thread Starter
::Regional Moderator::
Joined: Aug 2011
Posts: 4,742
Likes: 10
From: Jacksonville, NC
Year: 1993
Model: Cherokee
Engine: I6 4.0L HO
CF Veteran
Joined: Apr 2011
Posts: 14,553
Likes: 1
From: Carrollton, GA
Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output
Hey I'm getting 5 mpg I'm all stock and I'm a 93 auto xj on 235's I just did a tune up changed my spark plugs and oil wires and my o2.... I only drive to school and back like 10 miles but a tank of gass won't last me. Week
...i don't have any fule leaks and I just replaced my tps...help!!!!!
...i don't have any fule leaks and I just replaced my tps...help!!!!!

CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Seasoned Member
Joined: Jul 2011
Posts: 322
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From: Sierra Vista AZ
Year: 1990
Model: Cherokee
Engine: 4.0
Originally Posted by Bugsy
There could be any number of things causing low MPG but I would check your distributor cap first and make sure the contacts are all clean and the cap is in good condition. A faulty O² could be causing it. A plugged air filter/intake will cause this. Incorrect ignition timing, worn timing belt, centrifugal advance mechanism sticking, defective coolant temp sensor, clogged or defective PCV valve, vacuum leak, dirty injectors, bad fuel pressure regulator...
There are a lot of things that could be wrong but start with your distributor and make sure you're getting good spark.
There are a lot of things that could be wrong but start with your distributor and make sure you're getting good spark.
Registered Users
Joined: Aug 2009
Posts: 791
Likes: 0
From: Ny
Year: 1995
Model: Cherokee
Engine: 4.0ho
you aren't getting 5mpg lol.
its probabaly getting stolen, or you arent filling it enough, or you are doing the math wrong. The worse tune up and the heaviest foot would make it hard pressed to get 5 miles per gallon, hell a jeep floored for 5 miles would probabaly still get 5mpg lol.
get a locking gas cap, and see if the thief decides punching a hole in the tank makes more sense.
on the lighter side, my grandfather RIP, wayyyy back in the day, had a volvo or something smaller I forget which, but he use to brag to all his co workers about how many MPG he was getting. Well after a while the co workers got sick of it, so they would go out in the parkinglot on lunch and add gas to the car on a regular basis, until finally he was getting like 70 mpg lollllll needless to say he never bragged about it once he realized what was happening lol.
its probabaly getting stolen, or you arent filling it enough, or you are doing the math wrong. The worse tune up and the heaviest foot would make it hard pressed to get 5 miles per gallon, hell a jeep floored for 5 miles would probabaly still get 5mpg lol.
get a locking gas cap, and see if the thief decides punching a hole in the tank makes more sense.
on the lighter side, my grandfather RIP, wayyyy back in the day, had a volvo or something smaller I forget which, but he use to brag to all his co workers about how many MPG he was getting. Well after a while the co workers got sick of it, so they would go out in the parkinglot on lunch and add gas to the car on a regular basis, until finally he was getting like 70 mpg lollllll needless to say he never bragged about it once he realized what was happening lol.
Senior Member
Joined: Jul 2011
Posts: 908
Likes: 1
From: SIERRA VISTA AZ
Year: 1992
Model: Cherokee
Engine: 4.0L 6 CYL
I did not think about it that way my 5.9 grand being hammered uphill to flagstaff with ac on only drops to 6 to 8. That does make more sense that someone my be helping themselves to you go go juice. Especially if you have no other drivability issues. Time for a camera to film at night or a big dog to guard it.
CF Veteran
Joined: Apr 2011
Posts: 14,553
Likes: 1
From: Carrollton, GA
Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output
I did not think about it that way my 5.9 grand being hammered uphill to flagstaff with ac on only drops to 6 to 8. That does make more sense that someone my be helping themselves to you go go juice. Especially if you have no other drivability issues. Time for a camera to film at night or a big dog to guard it.
CF Veteran
Joined: Oct 2011
Posts: 2,613
Likes: 0
From: Summerville, South Carolina
Year: 99
Model: Cherokee
Engine: 4.0
Someone stole my gas. I had a lil over a quarter tank, parked it beside my house, and the next day it was dry... I was surprised someone had the guts to get right next to my house just to get a few gallons of gas. Getting a locking cap soon as possible!! >:0


