can any one tell me what this sensors are and what would happen if they are not pluged in thanks.

 

LOL... Service manual would tell you what those are.

I can def tell you need at least 2 of those sensors because one is TPS and the other looks like a missing MAP sensor port. I can't really tell what the third one is, maybe the map sensor but it looks like it's got 2 big hoses leading to it so shouldn't be the map sensor. Not sure what that is since I'm not that familiar with the GSR manifold.

Janos

 

the one on the back of the throttle body is the TPS, the one missing on top is the map, which you can just block off if you are using the stock firewall mounted map. and the one on top of the manifold (I think not too familiar with gsr manifold) Is some kind of purge solenoid, which I dont think you need as well if you are using the firewall mounted purge solenoid