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-   -   4.0 terrible mpg (http://www.jeepgarage.org/f196/4-0-terrible-mpg-7812.html)

2000 Grand 03-23-2010 07:40 PM

4.0 terrible mpg
 
Hey guys my 4.0 WJ has about 92500 miles on it and my mpg are terrible I'm barely getting 13 between highway and city... Any suggestions as to why this may be happening?

Chaoul1 03-23-2010 07:44 PM

Re: 4.0 terrible mpg
 
That's pretty good for City. You should replace you PCV Valve, New Spark Plugs, new Air Filter (If Dirty), new fuel filter, Fresh oil change. Those should help. I won't guarantee 5MPG more but it will help. Plus it also depends on your Foot.

2000 Grand 03-23-2010 08:11 PM

Re: 4.0 terrible mpg
 
Alright thanks Ill check the air filter tomorrow and then I'll go get new sparkplugs this weekend... See if that helps.. And I just got an oil change this past weekend

Chaoul1 03-23-2010 08:16 PM

Re: 4.0 terrible mpg
 
Get the recommended Spark Plugs. Don't get the most expensive ones. And make sure you Torque them down to the correct Torque.

2000 Grand 03-23-2010 08:22 PM

Re: 4.0 terrible mpg
 
Alright I'm gunna talk to my dad about it and if he's not busy this weekend he'll help me do it

Chaoul1 03-23-2010 08:27 PM

Re: 4.0 terrible mpg
 
It's real simple and very easy. Here's something that will help you a bit :)http://wjjeeps.com/service/sparkplugs.htm

2000 Grand 03-23-2010 08:30 PM

Re: 4.0 terrible mpg
 
Hey thanks for the help man

Dylans3960ccs 03-23-2010 08:47 PM

Re: 4.0 terrible mpg
 
come on, I did the sparkplugs by myselfe and I'm only 16 :P lol

what I'm saying is that if I can do it you can too!

2000 Grand 03-23-2010 08:50 PM

Re: 4.0 terrible mpg
 
I'm only 16 too dude I'm just gunna have him teach me how todo it so I dnt f&$k anything up

Dylans3960ccs 03-23-2010 09:04 PM

Re: 4.0 terrible mpg
 
there's noting to it, except getting the coil packs off was a little tricky.

Chaoul1 03-24-2010 09:27 AM

Re: 4.0 terrible mpg
 
Quote:

Originally Posted by 2000 Grand (Post 175106)
I'm only 16 too dude I'm just gunna have him teach me how todo it so I dnt f&$k anything up

I'm only 18. When I first got my WJ I was 16 :). They are pretty easy to work on. Don't worry you won't mess anything up just take your time.

bmflyfish 03-24-2010 09:35 AM

Re: 4.0 terrible mpg
 
Quote:

Originally Posted by 2000 Grand (Post 175106)
I'm only 16 too dude I'm just gunna have him teach me how todo it so I dnt f&$k anything up

Some of my fondest memories are of my dad and I working in his garage together. One of the things I miss the most. So have fun and enjoy the day with him.


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