1997 f250 7.3 hd I have developed a fuel leak around my fuel filter. It leaks around the bottom of the thing my finger is on. What is it called and is there an o-ring I need to replace to make the leak stop?
Any input is appreciated TIA!

 

Nobody has any input?

 

Is it the switch that the fuel is coming from.

 

Where my finger is in the bottom picture, it's a fitting that I tightened but it's still leaking I can take more pictures if that helps

 

That fitting is a restriction sensor I believe. I wouldn't tighten it too much cause you could crack the housing. You could remove the fitting ant try some thread sealer but odds are it's leaking through the sensor. I think you can also just use a plug and eliminate it

 

Correct, fuel filter restriction switch. No O-ring; it's NPT (plumbing) thread, i.e. the threads act as the seal. +1 on DO NOT overtighten. You could try some pipe joint compound on it (Gasoila, etc.) and re-installing. If it's the switch itself that's leaking, one option is to replace it with an NPT plug. This switch only turns on the "FUEL FILTER" dash light; no interface with the PCM or anything else in the truck.

 

That valley needs a good cleaning!