HELP! Fuel Leak

[DaveHess]

I installed my FASS 95/95-1008 this past weekend and cannot get the fitting at the CP3 to stop leaking. We're not talking fuel pouring out or anything like that. After the truck sits for a half hour or so, I'll have a spot on the ground below the CP3 about 2 to 3 inches across. During the initial installation I torqued the fitting and the elbow to the instruction specified 18lb-ft of torque. I used an inch pound torque wrench as my lb-ft torque wrench only goes down to 20. That conversion netted me a torque of 216 in-lb of torque (18x12). I have since put a wrench to both fittings and tightened further to no avail. I have a PM into LowFly (Jim) at FASS and I talked to Andy at Geno's but right now as far as I am concerned my truck is a dead stick. My next step was to remove the injection pump fitting and very carefully wrap teflon sealing tape around the threads and then re-torque that fitting. I don't know if the tape would help the 90 degree fitting. I told Andy the FASS is putting 17-18 PSI into the CP3 and he indicated that was not excessive for the CP3. I did drain the OEM fuel and bagged it. I also emptied the OEM fuel filter cannister. The area around the the injection pump inlet fitting is where it is "moist".



Does anyone have any suggestions or have experienced this with their FASS installation?

 

[SShafranko]

Take the fitting off and inspect it. Wether you see any damage or not get another one and install it. Depending on which elbow it is you should be able to find it localy somewhere. It sounds like the elbow is leaking on the CP3 side not the line side? If so that side should have threads to replace the banjo bolt, right? Did you use any thread sealer? If not i would. Good luck.

 

[DaveHess]

SShafranko, Thanks for the quick reply. This part of the FASS install is three pieces. The actual hose, a 90 elbow, and the injection pump fitting. The injection pump fitting has a metal gasket and an o-ring. The hose connection is fine and it is up against the yellow ring on the elbow. The is no wetness on the hose or where it joins the elbow. It is either where the elbow joins the injection pump fitting or the injection pump fitting. I wasn't sure about using thread sealer on the injection pump fitting. I am just sitting here shaking my head. There are times when I wish I had the ability and the wherewithall to leave well enough alone...

 

[SShafranko]

If it has an o-ring dont put anything on it. The o-ring should seal it. Are you sure it's coming from the fitting? I read a post about the same exact thing recently and i think this person found that his original feed line was seeping fuel out of it.

 

[LowFly]

DaveHess... ... you have a PM

 

[DaveHess]

If it has an o-ring dont put anything on it. The o-ring should seal it. Are you sure it's coming from the fitting? I read a post about the same exact thing recently and i think this person found that his original feed line was seeping fuel out of it.

Yep. Thought of that. Did my level best to drain it. I bagged it and used a zip-tie. Drained the cannister just in case somehow it was pushing fuel out of the line. I have been fighting with this since Saturday.

 

[DaveHess]

Fixed

Well, went home last night. Mowed my two acres of grass and then went to work on the truck at about 2100 hours. I took the FASS line and fittings back off the truck. I wrapped teflon sealing tape around the injection pump fitting and then trimmed the tape as it covered the "o" ring. If you tape first and then reinstall the "o" ring, the "o" ring will be expanded and then the metal seal does not fit around the "o" ring when installed. So, taped it, trimmed it and then taped the threads for the taper fitting. Put everything back together and no leak. This is another one of those "I should have done this the first time" things. I did not take the cover off of my APPS when I did the initial installation because the picture in the instructions showed it in place (3A and 3B). I tokk it off this time and the job was way smoother. I also removed the OEM rubber line and injection pump fitting while I had everything apart.



So, next is going to be the GDP filter elimination kit. I was going to leave the OEM filter for that "just in case" situation. Instead I am going to show faith to FASS and install the GDP. You guys enjoy!