I'm having trouble getting my system to spray and feel like the fuel pressure safety switch is the culprit. Can you bypass this for testing with a jumper wire around the two terminals? Anyone have advise on how to calibrate this thing. I've got a fuel pressure gauge and a volt meter, but how do you test whether it is set correctly?

Thanks!

 

It is a normally open switch. Fuel pressure closes the switch and completes the circuit. To test it check it for continuity take the wires off. The switch should be open when there is no fuel pressure and it should be closed (will pass current) when the fuel pressure is above the setting of the switch.

I adjusted mine by hooking up a continuity tester to the switch (a 12 volt test light will work fine). I then rigged up a way to connect the switch to my air hose. I set the air pressure regulator at 0 and slowly raised the air pressure to a point where the switch closed. It was set at 35 psi from the factory. I then adjusted it so it is now set to close at 45 psi.

And yes if you want to just see if it is causing the system not to work you can hook a jumper wire to the 2 terminals or you can put both wires on the same terminal.

 

Clockwise will raise pressure, or set point.
Counter clockwise will lower pressure, or set point.

Besides the jumper method, you can conect both wires onto one terminal to bypass also.
Robert

 

Thanks, guys!! The anticipation of spraying this thing is absolutely killing me!!

 

Robert:
I beat you to it on that one.
But you are usually way ahead of me.

 

Yep, you did, and I missed it.
Robert