What is this sensor on top of the transfer pump(primer)

[1 Patriot-of-many]

I'm losing prime, when I use the primer pump I'm getting fuel and air bubbles coming out of the top of this sensor and of course when I finally get the truck started. I looked in the Parts TM, it shows a plug instead of this electrical device. Anyone know what it does and what the part number is? I assume I need to replace it if there's fuel coming out of the top of it.

 

[simp5782]

Out of the sensor itself or from the threads?

 

[1 Patriot-of-many]

Out of the sensor itself or from the threads?

Sensor itself, out of the top where the wires go in. I don't even know what this sensor is for, can't find it in the parts TM. It shows a plug there.

 

[simp5782]

on the A3?

 

[1 Patriot-of-many]

No M936a2.

 

[hirollin87]

Fuel Pressure transducer

 

[simp5782]

http://www.steelsoldiers.com/showthread.php?120271-Fuel-switch-above-primer

 

[1 Patriot-of-many]

Fuel Pressure transducer

Okay so what exactly does it do, is it necessary? Seems weird the -24P TM doesn't even show it, so I have no clue what the part# is. I did a quick online check for fuel pressure transducer 6CTA and came back with one place, but they don't have pictures of them only prices from 64 to 400+.......Maybe I should just find someone parting out a truck for this thing!

 

[simp5782]

Check the thread i posted.

 

[1 Patriot-of-many]

Check the thread i posted.

Thank you. I missed the post about it being for the diagnostic port. Took me a second time and actually READ the thread.....LOL Thanks a bunch guys, I'll just plug it off. Since I can't see I'll ever find the diagnostic stuff cheap.

 

[painter paul]

They leak sometimes and the quick and easy fix is to just take it out and plug the opening!

 

[MtnSnow]

The Fuel Transducer is part of the ICE diagnostics package for the M939 trucks. It is only needed when doing diagnostics with the ICE interface.
Unplug the transducer & Remove it and then put a plug in the open port of the primer/lift pump.