yj problems - Great Lakes 4x4. The largest offroad forum in the Midwest

Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Jeep Tech
GL4x4 Live! GL4x4 Casino

greatlakes4x4.com is the premier Great Lakes 4x4 Forum on the internet. Registered Users do not see the above ads.
Search
Reply
 
Thread Tools Search this Thread
Old January 29th, 2006, 11:28 AM   #1
muddslinger
Senior Member
 
muddslinger's Avatar
 
Join Date: 11-06-05
Location: Marquette, MI/White Lake
Posts: 602
iTrader: (3)
Mentioned: 0 Post(s)
Send a message via AIM to muddslinger
Default yj problems

95 yj 2.5L


1. for the past 2 weeks, i have had massive mpg loss. i dont even know what im getting around city right now but i went up north friday and got about 13-14 mpg highway and usually get like 16-17, then on the way home today i got about 8-9 mpg highway. so what is up with that?


2. on the freeway home today i had a huge problem keeping speen, it was kind of off and on. i would be going fine in 5th, then i would loose alot of powere and my speed would decrease even with my foot to the floor. then i would put it in 4th very slowly get up to speed, put it in 5th and repeat. but then after awhile it would go back to normal. ???
muddslinger is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old January 29th, 2006, 05:09 PM   #2
BigBlkYJ 355
U-Joints Fear Me
 
BigBlkYJ 355's Avatar
 
Join Date: 11-05-05
Location: Clawson
Posts: 3,361
iTrader: (4)
Mentioned: 0 Post(s)
Default

maybe a dirty fuel or air filter? bad injector? is the check engine light on?
BigBlkYJ 355 is offline   Reply With Quote
Old January 29th, 2006, 05:52 PM   #3
87'YJ
Jeeps, Journey and Jesus
 
87'YJ's Avatar
 
Join Date: 11-07-05
Location: Columbus
Posts: 1,651
iTrader: (2)
Mentioned: 0 Post(s)
Default

Mine did the same thing and it turned out to be the fuel pump. (its an $18 part from murrays, very easy to replace, but hard to diagnose if it is not pumping at 6 PSI).

I would change the fuel filter first just to see if that is the problem.

Then of course, it could be electrical, but thats another issue
87'YJ is offline   Reply With Quote
Old January 29th, 2006, 06:52 PM   #4
muddslinger
Senior Member
 
muddslinger's Avatar
 
Join Date: 11-06-05
Location: Marquette, MI/White Lake
Posts: 602
iTrader: (3)
Mentioned: 0 Post(s)
Send a message via AIM to muddslinger
Default

bigblkyj- fuel filter is realitivly new and same with air filter. lights not on

87'yj- fuel filter is good, mabey it is the fuel pump.
muddslinger is offline   Reply With Quote
Old January 29th, 2006, 08:41 PM   #5
87'YJ
Jeeps, Journey and Jesus
 
87'YJ's Avatar
 
Join Date: 11-07-05
Location: Columbus
Posts: 1,651
iTrader: (2)
Mentioned: 0 Post(s)
Default

pull off the fuel hose right before the fuel filter and turn the jeep over. See if there is fuel pumping. It should be a strong steady stream. If it is weak, or not pumping, it is your fuel pump. the symptoms you described are the exact same thing that I had go wrong with my jeep a while back.
87'YJ is offline   Reply With Quote
Old January 29th, 2006, 09:55 PM   #6
Tonka
YJ build in progress
 
Tonka's Avatar
 
Join Date: 11-05-05
Location: Lapeer Township, Mi.
Posts: 2,063
iTrader: (9)
Mentioned: 1 Post(s)
Send a message via AIM to Tonka Send a message via Yahoo to Tonka
Default

fuel pump for a 95 will run $100+
Tonka is offline   Reply With Quote
Old January 29th, 2006, 10:14 PM   #7
Mclovin
"The Situation"
 
Mclovin's Avatar
 
Join Date: 11-07-05
Location: Westland, Mi
Posts: 14,393
iTrader: (15)
Mentioned: 0 Post(s)
Send a message via AIM to Mclovin Send a message via Yahoo to Mclovin
Default

Quote:
Originally Posted by Tonka
fuel pump for a 95 will run $100+
yea. 87'Yj there prob has a carb. motor which has a lil cheapy 6-8 psi pump..
Mclovin is offline   Reply With Quote
Old January 29th, 2006, 10:21 PM   #8
clarkstoncracker
lol
 
clarkstoncracker's Avatar
 
Join Date: 11-03-05
Location: OC - MI
Posts: 42,563
iTrader: (40)
Mentioned: 122 Post(s)
Send a message via AIM to clarkstoncracker
Default

If you end up needing a fuel pump, I have 2 working ones in the barn .
__________________
clarkstoncracker is offline   Reply With Quote
Old January 30th, 2006, 05:54 AM   #9
muddslinger
Senior Member
 
muddslinger's Avatar
 
Join Date: 11-06-05
Location: Marquette, MI/White Lake
Posts: 602
iTrader: (3)
Mentioned: 0 Post(s)
Send a message via AIM to muddslinger
Default

alright thanks cc, ill check it out and let you know
muddslinger is offline   Reply With Quote
Old January 30th, 2006, 09:39 AM   #10
Gunsworth
Senior Member
 
Gunsworth's Avatar
 
Join Date: 11-07-05
Location: Birmingham
Posts: 2,537
iTrader: (12)
Mentioned: 2 Post(s)
Send a message via AIM to Gunsworth
Default

This may sound stupid, but have you checked your brakes? Mine started doing this exact same thing and when I went to change my brakes I found that both calipers were sticking/dragging.
Gunsworth is offline   Reply With Quote
Old January 30th, 2006, 12:47 PM   #11
Mclovin
"The Situation"
 
Mclovin's Avatar
 
Join Date: 11-07-05
Location: Westland, Mi
Posts: 14,393
iTrader: (15)
Mentioned: 0 Post(s)
Send a message via AIM to Mclovin Send a message via Yahoo to Mclovin
Default

Check your Catalytic also theyc can cause poor MPG and performance.. run a back pressure check
Mclovin is offline   Reply With Quote
Old January 30th, 2006, 12:55 PM   #12
Monster4.0
Senior Member
 
Monster4.0's Avatar
 
Join Date: 11-07-05
Location: Carleton
Posts: 1,585
iTrader: (7)
Mentioned: 0 Post(s)
Send a message via Yahoo to Monster4.0
Default

I would scan it for codes first, but O2 sensors, and coolant temp sensors(the front one) both make it run rich when they go bad.
Monster4.0 is offline   Reply With Quote
Old January 30th, 2006, 01:58 PM   #13
muddslinger
Senior Member
 
muddslinger's Avatar
 
Join Date: 11-06-05
Location: Marquette, MI/White Lake
Posts: 602
iTrader: (3)
Mentioned: 0 Post(s)
Send a message via AIM to muddslinger
Default

no cat so that has nothing to do with it.
gunsworth- my rear brakes are screwed up, i was planning to take it into my automechanics class this week or next to replace a bunch of stuff on the rear brake assembly so i guess that could be it.

monster4.0- if you mean scan by using the idiot light, its not on. o2 sensor was recetly replaced so it shouldnt be that.
muddslinger is offline   Reply With Quote
Old January 30th, 2006, 02:13 PM   #14
Monster4.0
Senior Member
 
Monster4.0's Avatar
 
Join Date: 11-07-05
Location: Carleton
Posts: 1,585
iTrader: (7)
Mentioned: 0 Post(s)
Send a message via Yahoo to Monster4.0
Default

I was thinking the autozone free scan, but cycling the key front to back three times works also.
Monster4.0 is offline   Reply With Quote
Old March 2nd, 2006, 05:30 PM   #15
muddslinger
Senior Member
 
muddslinger's Avatar
 
Join Date: 11-06-05
Location: Marquette, MI/White Lake
Posts: 602
iTrader: (3)
Mentioned: 0 Post(s)
Send a message via AIM to muddslinger
Default

so i did a compression test and compression is fine, what else could it be that would cause that shitty of mileage
muddslinger is offline   Reply With Quote
Old March 2nd, 2006, 06:29 PM   #16
shawn
Resident HVAC/R Jambi
 
shawn's Avatar
 
Join Date: 11-05-05
Location: Milford/Commerce
Posts: 10,076
iTrader: (24)
Mentioned: 9 Post(s)
Send a message via Yahoo to shawn
Default

So what is your problem? Just shitty gas mileage? Well, the weather for one, the type of gas in the pumps for two, your running 31's for 3, it's a jeep for four.
shawn is online now   Reply With Quote
Old March 2nd, 2006, 06:30 PM   #17
shawn
Resident HVAC/R Jambi
 
shawn's Avatar
 
Join Date: 11-05-05
Location: Milford/Commerce
Posts: 10,076
iTrader: (24)
Mentioned: 9 Post(s)
Send a message via Yahoo to shawn
Default

Is this a 4cyl or 6cyl? Have you done a recent tune up?
shawn is online now   Reply With Quote
Old March 2nd, 2006, 07:08 PM   #18
BlooMule
pew pew
 
BlooMule's Avatar
 
Join Date: 11-08-05
Location: a mile from the shithole
Posts: 25,323
iTrader: (12)
Mentioned: 17 Post(s)
Default

Quote:
Originally Posted by shawn
Is this a 4cyl or 6cyl? Have you done a recent tune up?
First post sez it's a 2.5 4 popper

Did the problem show up after putting on the 31's? My 89 became a complete dog after going bigger in the tire department. I went to 4.88's and not only did my mileage jump (mathematically corrected by distance check) but I also can PASS people on the freeway....these litlle motors like a lot of gear.
__________________
-rw-rw-rw
BlooMule is offline   Reply With Quote
Old March 2nd, 2006, 08:36 PM   #19
muddslinger
Senior Member
 
muddslinger's Avatar
 
Join Date: 11-06-05
Location: Marquette, MI/White Lake
Posts: 602
iTrader: (3)
Mentioned: 0 Post(s)
Send a message via AIM to muddslinger
Default

they problem is new, it jsut started a few weeks ago, the tires have been on ther for a long time. tune up in the fall. fuel filter a couple weeks ago. i cant imagine gas would be this bad from weather. i mean this is significant, im getting under 10 mpg city and about 11-12 highway, i used to get about 16-17 highway.
muddslinger is offline   Reply With Quote
Old March 2nd, 2006, 09:51 PM   #20
BMFmike
meh.
 
BMFmike's Avatar
 
Join Date: 11-06-05
Location: Grand Haven
Posts: 7,816
iTrader: (6)
Mentioned: 1 Post(s)
Default

I have seen this problem many times

Your toe-nails are stuck in the radiator, it happens when you are young.
BMFmike is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Jeep Tech

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 05:47 PM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Page generated in 0.21552 seconds with 80 queries