I looked thru the search engine here on the site and could not find a defined topic on the subject.

I talked to my brother in law about my gas milage falling (he is a mechanic), he suggest that I change my fuel filter. I was wondering if anybody has done this and if it helped at all??

Thanks for the time

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Life's Tough...It's Even Tougher If You're STUPID
2006 KJ Sport 3.7L 226cid V6 42RLE w/
Clevis Lift, Mopar Underbelly's, Tow Hooks, Tow Hitch, Custom Rock Rails, Debadged
WANTS:
OME Coil Lift, Crager Soft 8's 16x8 4"bs, Custom Roof Rack, Steel Bumpers, Cobra 75X CB w/ Firefly, Lots O Lights, Lockers, Four X Diff Cover, One Bad Jeep

Yes, there are people that have done it. It isn't the easiest thing to do, it requires you to drop the gas tank. The filters are supposed to be "lifetime" fuel filters, and are supposed to need chaning. Chysler must have designed some kind of backwashing to prevent clogs, but still, it may clog eventually.

How many miles do you have on your Jeep? Changing the fuel filter isn't a bad idea, but I'd check the easier possible causes first. Check the air filter, then the spark plugs. Do you change the oil yourself? Are you using 5w30 or 5w20? A thicker oil will decrease mileage. Also have you tires rotated, balanced and inflated properly, low air pressure will decrease mileage. Having you alignment checked, and fixed if needed, wouldn't hurt.

Have you had your brakes checked? A dragging brake can hurt mpg's. Have you added any accessories that incrase drag, or are you carrying extra weight? Have you changed wheel/tires, heavier/larger diameter wheels and tires will hurt your mpg's. More aggressive tread will hurt mpg's as well.

A faulty O2 sensor could be causing you engine to run rich, hurting your mileage. You injectors could be clogging (not likely).

Have your driving habits changed? Are you driving in town more as opposed to highway driving, i.e. more stop and go driving? That can decrease mileage.

Another reason could be the gas itself. I've noticed a lot of stations have started adding ethanol, it almost impossible to find one that doesn't where I am. Most pumps will state 'May contain up to 10% ethanol'. I've noticed with 10% ethanol my mileage drops by about 10%. Not all states require an ethanol notification on the pump. Maybe your station is using an ethanol blend, and hasn't posted anything about it.

That's everything I can think of that could hurt your mpg's.

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2012 Jeep Wrangler Rubicon

try to check the Manual first, I have an 02, and all I did was lift the rear cargo rug and there was an access cover, I removed it and was able to change it without dropping the tank. Not sure if all models and years are the same.

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“You cannot solve a problem from the same consciousness that created it."

“Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.”

That would be easy. I removed the entire interior on my KJ to soundproof it and was unable to lift the rear cargo carpet. It is held down by the tie down points, which are rivetted in place. The only way to remove them is to drill out the rivets.

You mind posting a pic?

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2012 Jeep Wrangler Rubicon

I answered my own question.



Now, I wonder if there is an easy way to replace the rivets with bolts, or if you just remove them, would the carpet stay in one place (with two dogs crawling around on it)?

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2012 Jeep Wrangler Rubicon

Not all KJ's have that type of access panel,mine doesn't and it's a '02.

I knew you had referenced dropping the tank before. Funny the little things they change mid-year.

That pic is straight out of the 02 Service manual. It's exactly the same in the 03 & 04 service manual. The 05 service manual says,

'The fuel filter and fuel pressure regulator are combined within the fuel pump module assembly. They are not serviceable.'

Not sure what the newer manuals say, but I'd guess they're the same as the 05's.

It's weird they'd require a drill to get to it. Every other vehicle I've owned has relative easy access to it.

I may see what mine looks like under there after this next business trip is over. So here in a couple of weeks.

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2012 Jeep Wrangler Rubicon