Intake manifold sensors/vacuum lines

[Captain-Obvious™]

This picture isn't my manifold. I'm missing the sensor at circle number 1 and 4. And I need to know what they are. Also, where do the vacuum lines for circles 2 and 3 go?

http://s257.photobucket.com/albums/hh230/mrhan44/102_1371.jpg

[NoWAyItZTOMmY]

2 goes to brake booster
3 goes to pcv black box thingy mabober

1 some black sensor
4 is iat

[Barefoot]

1 is evap purge vavle

[1SOL2NV]

4 is intake temperature sensor i believe.

[Barefoot]

4 is intake temperature sensor i believe.

same thing NoWAyItZTOMmY just a different name