Leaking fuel here

Zexell · Dec 29, 2004

Earlier today, The car had been off for about a good hour, and out of the blue, i smelled gas. So i pop my hood to find out that there is pressure from the fuel filter to the fuel rail, and with pressure comes fuel. It dripped 1 drop a second for about 5-10 and it went away.
I boosted a lil bit. I seem to notice that when i boost more than average, it tends to leak.

Here are some pics.

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The leak

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So what can I do? I sure hope this isnt normal.

Zexell · Dec 29, 2004

I think the previous owner of my car had upgraded his fuel rail and in time, he put the stock one back on to sell it. Not sure if that plays a factor.

steve · Dec 29, 2004

Sounds like you might need a new o-ring at least. It fits on the side going to the fuel filter to seal it to the rail.

Steve

project94tsi · Dec 29, 2004

do forget to depressurize your fuel system before you take that off to replace the o-ring

Zexell · Dec 29, 2004

Thats what I was thinking. An o-ring. I cant seem to find it at any auto-parts store. Is there a specific name for these lil buggers??

edit: according to vfaq, its the fuel pump to the fuel rail. The fuel pressure sender too. The puts are up there, if someone can help me narrow out my problem.

steve · Dec 30, 2004

The Mitsubishi part number for the one on the fuel line is MB554317. The one for the other end of the fuel rail on the regulator is MD604696.

Steve

gsx951 · Dec 30, 2004

Fix the leak now!
I have seen this ignored, only to later burst into flame.

Zexell · Dec 30, 2004

I came up with nothing searching for those mitsubishi codes.

steve · Dec 30, 2004

Zexell said:
I came up with nothing searching for those mitsubishi codes.

Searching where? Those are the part number from the dealer. They're cheap just call the closest dealer and pick them up.

Steve

Zexell · Dec 30, 2004

I just want to make sure that the o-rings are what I need. It'll close the gap that's leaking the fuel in the pictures above? thx.

steve · Dec 30, 2004

Zexell said:
It'll close the gap that's leaking the fuel in the pictures above? thx.

If it's the o-ring that leaking, yes. If the rail or fitting are fubar, no.

Steve

Zexell · Dec 30, 2004

How do i depressurize the fuel system so I can install the o-ring? Also, its just a piece of gasket I stick in between the rail and bronze pipe piece? Is there any guide for this install?

edit: Called mitsubishi and none of them carry the parts. I could order them but it'll take a week, and i'd like to install asap. Does autozone, pepboys, or napa carry these parts??

steve · Dec 30, 2004

Disconnect the fuel pump and try to start the car or just leave it overnight.
The o-ring goes on the fitting and fits inside the fuel rail.

Remove the two bolts.
Remove the old o-ring.
Lube fitting and new o-ring with motor oil
Roll it onto the fitting until it seats in groove.
Insert fitting into fuel rail.
Torque bolts to 3.6 ft lbs (5 Nm)
Pressure test fuel system and check for leaks.

Steve

Zexell · Jan 3, 2005

update:

I just came back from my dad's friend's shop.

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was the culprit. Damn O-ring.

He replaced it with some other green ring. After pushing it hard, there are no leaks as of yet.

Thx for the help fellas. :thumb:

steve · Jan 3, 2005

Looks like the PO rammed it in dry, and pinched it.

Steve

Zexell · Jan 3, 2005

steve said:
Looks like the PO rammed it in dry, and pinched it.

Steve

Whats PO and what can I do to prevent this from happening again?

psychlow · Jan 3, 2005

steve said:
Looks like the PO rammed it in dry, and pinched it.

Ramming it in dry is never fun. :thumbdown

PO = previous owner.

To make sure that doesn't happen again, always lube it lightly with WD-40 before putting the fitting on.

steve · Jan 3, 2005

The FSM calls for motor oil and that's what I use. WD40 has too much solvent in it for my liking. I don't keep any around since PB Blaster does such a better job freeing rusted stuff.

Steve

badbluething · Aug 3, 2017

hi I am having a leak here also, tried replacing the o-ring worked for awhile then started leaking again. any1 running a larger o-ring? or another solution? if so where did you get it/ what did you do?. i had to go to a Diesel truck fuel injector shop to even be able to find an o-ring similar to the OEM size..

steve · Aug 17, 2017

badbluething said:
hi I am having a leak here also. where did you get it/ what did you do?.

Not sure that it matters but what car?

The parts listed in the thread are still available from a Mitsubishi or Chrysler dealer as well as online.

1990TSIAWDTALON · Aug 17, 2017

Guys....he is hand feeding you here. Get the proper o-ring and move on. Its a very simple connection. Mitsu dealer or on line and have them delivered. Nothing on a DSM is cheap.
Thanks for the numbers Steve!

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Leaking fuel here

Zexell

Zexell

steve

project94tsi

Zexell

steve

gsx951

Zexell

steve

Zexell

steve

Zexell

steve

Zexell

steve

Zexell

psychlow

steve

badbluething

steve

1990TSIAWDTALON

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