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Unread 07-26-2006, 03:07 PM   #1
JaySpencer66
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Fuel Filter Replacement on a 91 YJ 4.0L

First, where is it? I have heard a nasty rumor here that it is on the frame rail by the driver's side rear wheel. Any tricks to getting it replaced/accessing it? I want to ditch it because in spite of replacing all the ignition components, coil, distributer, roter, plugs, wires, cleaned my cone filter, etc, I am still getting a little hesitation and stall on start up. I think the spark is good, I know the air is good, so that leaves me with fuel to address next in the holy triangle of air/fuel/spark.

I could do the alternator/distributer/battery combination too, but if it's as "simple" as a fuel filter then I would like to do that and be done with it, ya know?

Any advice is appreciated.

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Unread 07-26-2006, 03:13 PM   #2
dadstoy
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It's not bad at all. It is inside the frame rail. It is just the bolt that holds the bracket on and the two hose clamps. I used vise grips to pinch off the hose from the front to stop the flow of gas from there. Last time I changed mine was in a parking lot by Autozone....
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Unread 07-26-2006, 03:13 PM   #3
Big-n-Broke-YJ
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the filter is $10 at autozone.

the metal guard protecting the filter can be removed with 2 or 3 bolts.

the oem fuel line clamps will probably break so buy a couple extra worm gear clamps when you buy your filter.

make sure you install it in the proper direction.

total replacement time should take you less than 30 mins if you take your time.
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Unread 07-26-2006, 03:14 PM   #4
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You heard right, but it's easy to get to, 4x 10mm bolts to take off the little skid plate that protects it.
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Unread 07-26-2006, 03:25 PM   #5
JaySpencer66
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Gaaaahhhhh MORE freaking metric!!! Cool, I like the idea of using the vice grips, I was thinking along those lines to stop the gas flow, either that or moving with blinding speed and no sparks to get the old out and new in with no leaks. . . . .

I also like the idea of small hose clamps, smart, and will do.
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Unread 07-27-2006, 11:58 AM   #6
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Cool, all done! I only had two 10 mm bolts holding the skid plate and one 10m nut and bolt holding the bracket closed. I tried to use a vice grip to pinch the hose, no good. Perhaps if I had one that had even jaws it would have worked but that was not the case. I pulled the bottom hose off first and then, after getting an 8oz bath of gas and I think water that was in the filter because it did not smell too bad, I tipped the filter up to stop the flow. I pulled off the two old hose clamps on the bottom and replaced them as I attached the new filter, minding the direction of flow based on the arrow on the filter that tells you which way to go.

Then I rested the new filter in the bracket and pulled the old filter, by going up to keep the hose folded and above the level of the gas in the tank as much as I could.

With the old filter off I pulled the two old hose clamps and put new ones onto the top hose to be ready to attach the new filter.

I brought the line down and slipped it onto the new filter, put the clamps in place and tightened it all up.

Then I tightened the bracket holding the filter, put the skid plate back on, cranked the engine and prayed a little untill it turned over.

As advised it was about a 30 minute job. It took me perhaps 45 minutes because I took my time since it was the first one for me.

I used two ratchets with 10mm sockets to open the clamp, one to hold the nut and the other for the bolt head. The skid plate was held on with 10mm bolts too. The hose clamps were a small SAE but could have been done with a flat head screw driver or small nut driver.

If I have to redo it for any reason I will put the Jeep up on ramps for more space, although it wasn't bad at all without it.

The filter was about $10 and the clamps a few bucks. This is a VERY cheap fix.
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Unread 07-27-2006, 12:05 PM   #7
ltmke11
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I dont know if its different on a 91, but I didnt decompress the gas line on my 94 and got a nice gasoline spraying when I replaced mine a few months ago.
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Unread 07-27-2006, 12:28 PM   #8
JaySpencer66
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I didn't decompress my lines either and got a spray that I presume now was pressure related, and perhaps was not gravity induced as I thought earlier. It is fuel injected on the 91+, with a pump in the tank and I think we have the same motor and injection system, minus a few years.
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Unread 07-27-2006, 02:44 PM   #9
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Did you use fuel injection rated clamps?
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Unread 07-27-2006, 09:29 PM   #10
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Soooooo... did that fix your hesitation and stall on start up problem?
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