fuel pressure gauge, leave installed, or remove?

[neonshaun]

I recently installed a russell fuel pressure gauge, and banjo bolt onto my fuel filter to check if the pump was working properly:

http://www.amazon.com/Russell-65032...000CPCOL6/ref=cm_cr_arp_d_product_top?ie=UTF8
http://www.amazon.com/Russell-64070...&redirect=true&ref_=oh_aui_detailpage_o03_s00

The gauge was leaking around the threads on the first install, until I used some gas teflon tape around it.
Should I leave the gauge on, or remove it once I've taken the measurement?

 

[BTL3.0]

Mine been on for over 2 yrs now. Never leak.

 

[jwmelvin]

I have a permanent sensor installed in mine, feeding my data system. No leaks.

 

[blue_myriddn]

install it properly so it doesn't leak. leave it on. great tool to see if your main relay crapped out.

 

[neonshaun]

another question... i sealed the gauge threads with permatex high temp thread sealant... i can't smell any gas when it's under pressure.

But when the car is off, the gauge slowly goes back to 0 psi from 42. Is this normal, or should the system stay under 42psi pressure when the car is off?

 

[jwmelvin]

...when the car is off, the gauge slowly goes back to 0 psi from 42. Is this normal, or should the system stay under 42psi pressure when the car is off?

With an aftermarket fuel pump that is pretty typical. They seem not to have the check valve that the OE pump has. It's a reason that it can help to wait for the ~2 sec priming cycle to finish before cranking.

 

[boca rat]

With an aftermarket fuel pump that is pretty typical. They seem not to have the check valve that the OE pump has. It's a reason that it can help to wait for the ~2 sec priming cycle to finish before cranking.

Same here with a Walbro 255.

 

[neonshaun]

Yep, I've got a walbro 255.
I'll leave the gauge on then, thanks!