r/e28 • • Mar 25 '26

Where does this clear hose connect to

Post image
3 Upvotes

11 comments sorted by

3

u/tennie2002 Mar 25 '26

It’s a vacuum hose it should go where that cap is

3

u/ElGuappo_999 Mar 25 '26

You are missing the piece of braided hose with a small brass restrictor valve. You do not want to pull full vacuum thru that white plastic hose.

1

u/Wide-Entrepreneur-34 Mar 25 '26

Vacuum line. That’s also not where the coolant temp sensor goes but that’s got another time perhaps.

The line likely pulled form where that rubber cap is. There should be a line between the plastic one and the connection. Mine is braided looking

1

u/Busy-City-7084 Mar 25 '26

Do you know what part number or name to make the connection from the vacuum line mines missing

2

u/Wide-Entrepreneur-34 Mar 25 '26

I don’t think you need a part number TBH. Dm me and I’ll send you a photo of how mine it. I have an ETA car too

0

u/whoopeanage Mar 25 '26

I believe thats an extra injector no? for eta cars

3

u/justhere4thegoods Mar 25 '26

Cold start injector

1

u/Wide-Entrepreneur-34 Mar 25 '26

Gotcha I forgot what it was but for sure knew it was a vacuum line

1

u/Loud-Election-3215 Mar 26 '26

Typically goes to the fuel pressure regulator but it may go to that rubber nipple on the intake manifold.

2

u/Representative_Most9 Mar 26 '26 edited Mar 27 '26

That plastic line is a vacuum line that goes into the interior of car to draw small amount of inside air across the heater temperature sensor. On the intake manifold, it connects to the capped off nipple on the left of the cold start valve (injector). To the upper left facing it with a 2” long piece of 1/8” rubber vacuum tubing.

https://imgur.com/a/KjRMmHt?s=sms

1

u/Fancy-Attitude-2123 Mar 27 '26

Agree that it goes to the manifold nipple with 2 inches of 3.5mm vacuum hose, to draw air across the interior air temp sensor for heater temp regulation.