98 cherokee classic FUEL PROBLEM

harwood39 · Feb 28, 2007

ok. i have a 98 xj. I have only had it for a few weeks, but when ever i go around a left had turn or accelerate quickly, if and only if i have about a 1/4 tank or less, it stumbles. It starves for fuel at this time. Starts easily, drives perfect when its above 1/4 tank.

Could this be cause by a hole in the fuel hose connecting the pump to the sending unit assembly? its been doing this for a couple weeks now so i doubt it is the pump, plus its fine every other time. It even starts perfect. Just when it gets to that 1/4 tank mark, watch out.

Blaine B. · Feb 28, 2007

There could be a recall or factory service bulletin about it...run your vin on jeep.com.

Although if memory serves me correct, the fsb was only for a "clanging" or whatever in the fuel tank.

Fuel sloshing around in the tank will starve the pump of fuel, which also acts as a lubricant for the pump.....which still runs without any fuel while the stumbling occurs......

How quickly? It may just be normal.......don't roll your rig!

RichP · Feb 28, 2007

My 98 has done that since new, it's normal, mine does it on uphill left turns. As a note, it's a bad thing to let it get below 1/4 tank, the gas actually cools the pump as the pump is running continuosly. I try never to go over 200 miles which is about 11-12 gallons without refilling.

UNCC_99XJ · Feb 28, 2007

RichP said:
My 98 has done that since new, it's normal, mine does it on uphill left turns. As a note, it's a bad thing to let it get below 1/4 tank, the gas actually cools the pump as the pump is running continuosly. I try never to go over 200 miles which is about 11-12 gallons without refilling.

x2, only mine's a 99. I do my best not to let it go below 1/4 a tank as to not starve the pump, or overheat the pump.

98stocker · Feb 28, 2007

Hmmm, my 98 never does that and I always drive it until the fuel light has been on for a while. Fuel light comes on at about 15 gallons, and I usually put in 16-18 gallons. Wonder if you might have some water in the bottom of the tank.

x99j · Feb 28, 2007

i have heard 97+ xj's doing this when they get higher mileage on them due to the in tank filter being dirty. it always happens when turning left below 1/4 tank. i never let mine get below 1/4 due to the high price of a new fuel pump. mike

Blaine B. · Feb 28, 2007

The filter is supposed to last the life of the pump, so I doubt the filter would be dirty or clogged since it is designed to filter correctly until your pump is dead.

XpedientJ · Feb 28, 2007

There was a recent post re this same thing, where the problem was said to be a baffle in the tank that breaks loose... Recalled on one year, apparently, but not subsequent-year XJs which have also developed the same problem.

harwood39 · Mar 6, 2007

i do get a lot of sloshing in the tank when it is some what full, so i was thinking the baffle is fucked. but i do my best not to let it get below 1/4 tank now.

harwood39 · Mar 10, 2007

is there any way to fix this???? Its getting anoying and I work for EVAC, which is emergency vehicle assistance and communications, and search and rescue. It gets anoying durring fire calls...

jkmhb · Mar 12, 2007

Yes, the filters do get dirty, and the regulator on top of the pump assembly can go bad. It's a fairly common problem.

I bought a complete module from ebay - and changed the whole thing. You do need to completely drop the tank on 97+. Mine was $110 + shipping.

Seach for: cherokee fuel pump -grand - on ebay.

The whole thing is held on the top of the tank by a very large plastic nut. I used some 20" long channel locks to remove it.

98 cherokee classic FUEL PROBLEM

harwood39

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Blaine B.

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RichP

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UNCC_99XJ

Twisted Up

98stocker

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x99j

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Blaine B.

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XpedientJ

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harwood39

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harwood39

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jkmhb

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