2.2 intake manifold hole

[Forssling]

Hi All,
can someone shed some light over what this fine threaded M10 hole is for? It is on my left intake manifold on my 71T engine.

Or is it some PO stuff and should be plugged?

Thanks for any input,
Jörgen Forssling
Gothenburg
SWEDEN

[JJ 911SC]

Vacuum Port.

Mine is for Brake Booster and Fuel Pressure Regulator.

[Forssling]

Originally Posted by JJ 911SC

Vacuum Port.

Mine is for Brake Booster and Fuel Pressure gauge.

Thanks! So I will plug it.

Excuse me for a possibly stupid question, I'm a rookie at this. But does a fuel pressure gauge work out of vacuum?

Cheers,
Jörgen

[JJ 911SC]

Varsågod

I should have said Fuel Pressure Regulator (which got a Vacuum Port as well as a Gauge Port) to deliver the proper amount of fuel to the injectors in line with the vacuum produce in the intake: https://www.enginelabs.com/news/video-how-a-fuel-pressure-regulator-works-with-efi-university/

Skål

JJ

Originally Posted by Forssling

Thanks! So I will plug it.

Excuse me for a possibly stupid question, I'm a rookie at this. But does a fuel pressure gauge work out of vacuum?

Cheers,
Jörgen

[Forssling]

Thanks for educating me JJ!
I will possibly add a fuel pressure gauge but I'm running carbs so I guess it will be without vacuum.

Be good,
Jörgen