Please educate me if you know.

This is the back side view of a fuel pressure gauge that I bought today. And I noticed there is a very small screw in the center of the inlet.

Don't know what to do with it.

Thanks in advance! Click to view attachment

Anybody?

I am excited to use my first pressure gauge today.

Please tell me what to do with the small screw.

Should I screw it out or screw it in?

It is probably how they calibrate it. Don't mess with it. What make and model?

Thanks Paul,

It's a Summit product.

http://store.summitracing.com/partdetail.a...ew=1&N=700+

But if it's left as is, where does the fuel go in from?

There is no other hole.

God, I feel stupid!

Does it block the hole completely?

The pressure either pushes against that screw (and then the gauge reads that pressure) or it goes around the screw into something else

Yes, it blocks the hole completely and looks to be tuned only by an eye glass screw driver.

I really want to take it out because I really don't know why it's there.

Thanks!

Hi Aaron!

I thought the same thing. Googled it but ran into a wall. I would not remove it until you contact their tech support.

It's supposed to be there. It's liquid filled.Just install it and let it be.

Steve

He might know that by now.

I just installed it and worked fine.

I still wonder how the fuel got into the gauge unit since it looked to be plugged but it is OK.

The gauge showed 30 psi at the fuel rail.

Thanks everyone!