Sensor questions

Two sensor related questions...

First, I was working on the intake manifold today, there seemed to a place to be connected to on the firewall side of the intake manifold, but there wasnt anything plugged into it. No CEL. What is it?

Also, where is the oil pressure sensor?

that's probably one of the sensors that controls the idle. Based on where you say it is, tps sensor?

Thats up on the throttle body right? This one is kinda between the middle two runners on the firewall side of the intake manifold, down near the intake manifold support deal.

the one with the lil green wire?

Actually its unplugged.

so you pulg it into the sensor on the side of the tb

No. I'll just take a picture of it next time I go out there.