Build Update/Fuel leak help

[Nick Gustafson]

So I got the HX35 on, and installed the FTB kit. Overall remarks are that it's a bit peppier, a little smokey, and good on power. However, I've got a small fuel leak. The weird part is that it doesn't leak while running, just when I shut the truck down after running it. As far as I can tell, all of the lines are secure. It's running down the back of the block and dripping a little onto the crossover. Any thoughts on what it could be?

 

[Burning oil]

Under intake somewhere. FFM, hoses, IP.

 

[Nick Gustafson]

Hose going into the FFM is tight, and the hose going to IP is tight on both ends. Will check return line later today. Could the O-rings possibly be bad? It just seems to leak when there's no constant pressure on the system

 

[ak diesel driver]

Possible weep hole leak on the IP. Or leak on the FFM either orings or wires.

 

[Nick Gustafson]

Hmm, okay. I'll look into it a little further after I get home tonight. Any other ideas, feel free to post seeing as I won't be home until about 9:30pm

 

[Burning oil]

Flashlight and an inspection mirror is your friend.

 

[Nick Gustafson]

Upon inspection, all of the lines are tight. I'm assuming O-rings, so I'll be replacing those

 

[ak diesel driver]

I would verify where its leaking first. Sucks to do a job more than once.

 

[Nick Gustafson]

I've verified that the lines aren't leaking while it's running. It's just really weird that it's fine while running and under pressure, but as soon as I shut the truck off, it starts leaking

 

[Burning oil]

Thats hydraulics for you.

 

[Nick Gustafson]

@Burning oil does it sound like the o-rings then? or could the sensors/heaters just not be tightened enough?

 

[Burning oil]

If hoses are good then really only 2 other places for it to leak (under intake) are IP or FFM.
I can't say witch. Id inspect the FFM real good, try putting a paper towel under it and see how wet it gets.
Also an inspection mirror and flashlight is how I find IPs that leak from weep hole.

 

[Nick Gustafson]

Okay. What would it mean if the IP is leaking from the weep hole?

 

[Burning oil]

Rebuild time

 

[Nick Gustafson]

I REALLY hope it's the ffm then. It only did this after I swapped to an ftb modded ffm

 

[Burning oil]

Must be then, Are new fittings into FFM tight/sealed?

 

[Nick Gustafson]

As far as I know, they are

 

[Burning oil]

Seems like you need to haul yourself up in the engine bay and find out the answers to these important questions then.

 

[Nick Gustafson]

Oh I know. I just don't have the time for it until friday night. Everything is appreciated. I'll let you know once i can get everything apart and have a good look at what's going on. I talked with the guy I bought the ffm from, and he said that it may be the o-ring seals since it sat for awhile.

 

[NVW]

With a fuel pressure gauge, I see higher pressure after shut down than while running. The LP pumps until oil pressure drops.