Can any one help me find on the net any links to pictures or diagrams for the sensors on the 7.3 engine ? I'm in the process of changing out the mechanical fuel pump on my 97 f250 heavy duty and found the switch on the side of the fuel filter housing seeping pretty bad but don't know what it is called or what it does. It has one wire going to it. Any help would be appreciated.

 

It could be the Fuel Pressure Regulator. What side of the fuel filter is it on??

 

When looking at the front of the truck its on the right hand side of the filter housing

 

And is it hooked up high on the fuel filter housing or low? Low on the right side is the Water Sensor. And right next to it the heating element for the fuel filter housing. I'm not sure if they share the same power lead or not. My manual does not expand on that.

 

Its up high on the filter housing. I think your right with the fuelpressure regulator becuase the sensor screws in to a housing that has a scrhader valve of some sort maybe to check pressures

 

Yep, it looks like the fuel press. regulator.

 

Thanks Grinch