im getting 5mpg help
10-16-2011, 11:02 AM
#1
::Regional Moderator::
Thread Starter
Join Date: Aug 2011
Location: Jacksonville, NC
Posts: 4,742
Likes: 0
Received 9 Likes
on
5 Posts
Year: 1993
Model: Cherokee
Engine: I6 4.0L HO
im getting 5mpg help
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!!!!!
10-16-2011, 11:06 AM
#2
Senior Member
Join Date: Mar 2010
Location: Southern California
Posts: 855
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
Wow, okay, even for a Jeep that's not good MPG... Do you smell gas when you first start her up and sitting still? Make sure you don't have any fuel leaks. Also, does the engine sound good?
10-16-2011, 11:16 AM
#4
CF Veteran
Join Date: Dec 2010
Location: shawnee,ks
Posts: 9,897
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1993
Model: Cherokee
Engine: 4.0
Could have gotten a faulty o2, it happens. Do you know what brand you got? Because Bosch o2 sensors are ****. I can think of any other thinks that would do this except a leak but you said that isn't present
10-16-2011, 11:23 AM
#6
CF Veteran
Join Date: Dec 2010
Location: shawnee,ks
Posts: 9,897
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1993
Model: Cherokee
Engine: 4.0
Seafoam isn't going to fix a 10+ mpg deficiency. It's the failure of an emissions or fuel system part and in my mind I'm leaning toward the o2
Trending Topics
10-16-2011, 11:33 AM
#8
Member
Join Date: Aug 2011
Location: Vancouver, BC
Posts: 242
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0
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.
10-16-2011, 11:34 AM
#9
Junior Member
Join Date: Oct 2011
Location: Arlington, Texas
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1979
Model: Cherokee
Engine: 360 V8
There is 2 options
1) get a better fuel efficient car for to and from school driving..
OR!!!!!!!!
2) Get a strong girlfriend to push..
1) get a better fuel efficient car for to and from school driving..
OR!!!!!!!!
2) Get a strong girlfriend to push..
10-16-2011, 11:37 AM
#10
Member
Join Date: Aug 2011
Location: Vancouver, BC
Posts: 242
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0
10-16-2011, 12:45 PM
#15
CF Veteran
Join Date: Jul 2010
Location: 802
Posts: 4,930
Likes: 0
Received 3 Likes
on
3 Posts
Year: 99
Model: Cherokee
Engine: 4.0
The answer isn't a different car. That's a flippant, unhelpful response... Jeeps kick ***, all issues included!!! They are just frustrating when not runnin right 
boshc o2's don't seem good for jeeps. Get good oem ones- mine were like 110/ea. DONT say I overpaid, it's my budget!! (I had one guy say I overpaid. I didn't take to kindly to it...) umm, anyways... Both o2's could be suspect, still. Get it on a code reader to be sure... Also do some thread searches on poor mpgs? Check your tank, too!! Could be full of ****?? Good luck!
boshc o2's don't seem good for jeeps. Get good oem ones- mine were like 110/ea. DONT say I overpaid, it's my budget!! (I had one guy say I overpaid. I didn't take to kindly to it...) umm, anyways... Both o2's could be suspect, still. Get it on a code reader to be sure... Also do some thread searches on poor mpgs? Check your tank, too!! Could be full of ****?? Good luck!