Clogged fuel lines? - JeepForum.com

 
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post #1 of 8 Old 07-19-2014, 09:32 PM Thread Starter
jjs89yj
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1989 YJ Wrangler 
 
Join Date: Jul 2010
Location: Austin
Posts: 91
Clogged fuel lines?

Hey guys

After a 2 year body off project, I've finally gotten most of the heep back together. When I try to start the jeep, fuel leaks out just forward of the fuel filter (new tank and filter) almost like it's hitting a blockage in the fuel line closer to the engine. Gas never does make it all the way forward. Is it possible for these lines to get clogged? Ay recommendations for troubleshooting or where to start?

Thanks
Jeremy


1989 YJ: 2.5, ax5, 4" lift, 33" MTs
In the middle of a frame-off-- build thread to come
Parts in waiting: 1" bl, new tank, corbeau xrs seats, family-style roll bar swap, and whatever odds and ends need tending to.
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post #2 of 8 Old 07-20-2014, 03:50 AM
Delawdude
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1993 YJ Wrangler 
 
Join Date: Mar 2014
Posts: 389
Where do you mean by "leaks in front of the fuel filter"? Is it the connection point on the filter itself?

If it's at the connection point and you still have the metal lines, check to make sure you did not cross thread it. If it's rubber, then check the hose is not cracking and the little slits on the worm (hose) clamp did not cut the rubber. Would use EFI calamba that have solid bands if you can.

If connection is good---then I'd disconnect the line from the filter then disconnect the other end at the rail and either use a MightyVac (hand vaccum often used to bleed brakes) or an sir compressor set no higher than 30 psi if it can and pressurize the line to check for blockage. If pressure builds up then something's wedged in there. Either replace the line or "snake" it out with a small electricians snake---then Blow the line out and hook it back up to your filter but NOT to the rail. I'd put a bucket up front and purge the line for a few seconds with fresh fuel to flush the line again.

Then reconnect -- get out there and wheel it. -- break it and post here with the new dilemma :thumbs:

Good luck.
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post #3 of 8 Old 07-20-2014, 02:42 PM Thread Starter
jjs89yj
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1989 YJ Wrangler 
 
Join Date: Jul 2010
Location: Austin
Posts: 91
Thanks for the response! I checked connections and they aren't too bad. Disconnected the line at the outlet of the fuel filter and at the rail and hooked my compressor up to it and nothing is clogged. When I turn the key the pump runs and the jeep turns over, but then gas sprays out the rear connection on the fuel filter. Sort of like when when your thumb is over the end of a hose. I've tightened this connection down but still sprays. Any ideas fellas?

Thanks
Jeremy

1989 YJ: 2.5, ax5, 4" lift, 33" MTs
In the middle of a frame-off-- build thread to come
Parts in waiting: 1" bl, new tank, corbeau xrs seats, family-style roll bar swap, and whatever odds and ends need tending to.
jjs89yj is offline  
post #4 of 8 Old 07-20-2014, 02:58 PM
Delawdude
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1993 YJ Wrangler 
 
Join Date: Mar 2014
Posts: 389
Ah - is your filter in backwards? I guess that could cause back pressure and make it leak at the connection point on the rear. I know it sounds basic, bout it's possible to mistake the direction.

see this link: http://www.jeepforum.com/forum/f12/b...cement-903082/
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post #5 of 8 Old 07-20-2014, 03:01 PM Thread Starter
jjs89yj
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1989 YJ Wrangler 
 
Join Date: Jul 2010
Location: Austin
Posts: 91
The arrow on the filter should face towards the front of the jeep, right?

1989 YJ: 2.5, ax5, 4" lift, 33" MTs
In the middle of a frame-off-- build thread to come
Parts in waiting: 1" bl, new tank, corbeau xrs seats, family-style roll bar swap, and whatever odds and ends need tending to.
jjs89yj is offline  
post #6 of 8 Old 07-20-2014, 03:12 PM
Delawdude
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1993 YJ Wrangler 
 
Join Date: Mar 2014
Posts: 389
yep - sounds like that's not it. I have never tried, but is there a way to test the flow of the filter itself?
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post #7 of 8 Old 07-20-2014, 04:19 PM Thread Starter
jjs89yj
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1989 YJ Wrangler 
 
Join Date: Jul 2010
Location: Austin
Posts: 91
I replaced the fuel filter with another new one and it's not spewing gas everywhere now. I guess the other one was just a bad one. I still can't get the jeep started though. It'll crank and every now and then it sounds like it might start, but no dice. I've replaced the plugs with copper ones with a 35 gap.

1989 YJ: 2.5, ax5, 4" lift, 33" MTs
In the middle of a frame-off-- build thread to come
Parts in waiting: 1" bl, new tank, corbeau xrs seats, family-style roll bar swap, and whatever odds and ends need tending to.
jjs89yj is offline  
post #8 of 8 Old 07-21-2014, 08:44 PM
Delawdude
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1993 YJ Wrangler 
 
Join Date: Mar 2014
Posts: 389
Does it have fuel at the rail?
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