Hey everyone,
Im having some trouble figuring out what sensor this is and where it goes. Also, I have a vacum line that I am unsure of where to put it.(Pic Below)

Finally, I need to figure out how to run my heater core lines. I am putting a 89 TPI system on my 91 RS. I already deleted the Heater control valve. What fitting should I run a hose from to go to the firewall for the heater. I am also going to do the throttle body coolant bypass if that matters.

 

oil pressure sending unit. it goes on the rear china wall of the engine. if you are standing in front of the car, it is just to the right of the distributor.

 

The giant vacuum line goes from a port on the TB over to the charcoal canister.

 

Yes, the larger of the two goes to the port on the TB on the TPS side just below the larger air breather port. The othe smaller line goes to a port under the TB to the right of the IAC sometimes tee'd with the A/C ,and or the EGR solenoid vacuum lines.