Vacuum Switch

[Triflex]

1997 F350 7.3 P.S. I have a fuel leak from the vacuum switch (had a small crack) that screws into the fuel recirculation module located on the right side of the fuel filter housing on top of the engine. Also the threads were stripped where it screws in so I had two leaks, one in the module and one in the split switch so I had to J B Weld it to stop the leaks but don`t know if the switch is bad. Does anyone have an idea what this switch does and if the engine would run properly without it or how to test the switch without removing it? Thanks.

[NCHornet]

You may want to post this in the OBS section it may get more replies. This is the 99 and up section.
NCHornet

[Triflex]

Thanks to NC HORNET

[AFBLUE]

I just tested mine tonight!!! I am not sure what the function of the switch is besides turning on the fuel filter light on the dash, I dont know if it has a direct result linking it to the computer. But here it is, The switch connects at 7 inHG. It will read open on a meter, with no vaccum, but by taking my Mighty Vac bleeder pump, it would go click closed at 7 inHG. I also bought a new one from the dealer, and tested it, Ford part # E8TZ-9S283-A, and it functions the same way, so I did some fancy surgery heating a butter knife to reseal the package so I can take it back tommorrow.

[rankroddin250]

mine was leaking fuel through the electrical plugin. It cost me bout 70 bucks at ford for a new one.

[AFBLUE]

$37.35 unless my parts dealer is giving me a deal on parts?

[Triflex]

Mine was leaking fuel through it too. I sealed it with JB Weld, works fine. Thanks, guys for the replies.