Has anyone modified 2017 5.7L fuel rail to install a schrader valve for fuel pressure test?

It seems that Toyota, in their infinite (infinitesimal) wisdom, doesn't have a schrader valve for testing fuel pressure.

And while I've got you on the line, what is this plastic covered do-jiggy mounted on the fuel rail (see attached photo).

 

For flex fuel regulator.
https://www.racetronix.biz/p/adapter-qdf-5-16qdm-5-16-1-8-port/qda-56f56mp
You can search on Amazon for similar setup. Just get a decent gauge too.

 

Ask and this great forum will give an answer!

Thanks Mdl.

 

Hey, I'd still like to know what the part covered in plastic is.

 

It's the OEM fuel line connection locking "harness." Actually fairly standard for all...

 

Here's my install, using a schrader valve instead of a gauge.
Fuel rail adapter from Racetronix: $31.77 including shipping.
Schrader valve from Amazon: $15.97
Had to buy an adapter from NAPA (P/N 202 X 5) because the schrader valve didn't fit the Racetronix: $3.49
Bought fuel compatible O-ring for the adapter (P/N 2-12077): $8.29

The Racetronix fuel rail adapter didn't fit well. I ended up forcing it onto the fuel nipple with pliers. Suggest you call Racetronix to see if they have a slightly different sized adapter.