Hard to see what's going on there but it looks like part 22 vacuum hose.
Thanks! heh, heh... yeah so much fun! I wanted to do track-racing and researched for 9-months for best car to get based upon bang-for-buck-performance and Porsche was it! Only car that I could take from showroom straight to track without needing to upgrade suspension, wheels, brakes, etc. They work great if you leave them in stock form....Cool 944! Just blew up a Boxster a couple months ago. Porsche makes great cars and easy to work on.
Looks like tank-vent. Trace where other end of hose goes. Might be to EVAP canister. If so,definitely plug into port underneath tank.
What tests did you perform to conclude that fuel-pump is working fine?Alright so now I have rebuilt the fuel pump, it’s working just fine, I have replaced the fuel injector. The thing still won’t fire