[Jp-15]

Hey guys, I've been doing my homework on fuel pressure gauges because I'm having a problem with pressure dropping once the motor warms up.

I have narrowed it down to the liquid filled gauge. Just to be safe though, can I trust the gauge when I set the pressure to 6.5 lbs cold? Then I just dont trust it when it drop to 2-3 lbs warm?

 

[onebad82z]

Although I have heard this many times over the years about liquid filled gauges, I have yet to have any of the 3 I have used of which 1 I still use, do this.

I myself would try another gauge just to be positive.

 

[jmartorana]

I have had the same issue. Test it by pinching the rubber seal on the gauge and see if the pressure changes back to where it was initially set.

The way I solved it was by emptying some of the glycerin from the gauge. It is slightly more than 1/2 of the dial and it works perfectly now.

 

[F1 Speed]

I have had the same issue. Test it by pinching the rubber seal on the gauge and see if the pressure changes back to where it was initially set.

The way I solved it was by emptying some of the glycerin from the gauge. It is slightly more than 1/2 of the dial and it works perfectly now.

:yes: exactly ! Same results here as well.

 

[creeper72]

I have had the same issue. Test it by pinching the rubber seal on the gauge and see if the pressure changes back to where it was initially set.

The way I solved it was by emptying some of the glycerin from the gauge. It is slightly more than 1/2 of the dial and it works perfectly now.

What is the best way to remove the glycerin ?

 

[F1 Speed]

What is the best way to remove the glycerin ?

Pull the rubber plug on the gage and empty some out.

 

[Jp-15]

What is the best way to remove the glycerin ?

This is what I was wondering myself.

 

[jmartorana]

Remove the gauge and pull the rubber plug and let it drip out onto a rag. If you rip the plug dont worry just clean it up with thinner and put a dab of "the right stuff" over the hole and never worry about it again