I have a 97 SS and there is a sensor that I am not familiar with, I have more experience with a 94. The sensor is on the passenger's side of the intake manifold, it is round with an electrical plug and two air tubes, one of the air tubes goes to the air tube coming out of the wire loom that the fuel lines are coming out of. I know it must be something fuel related but whats its purpose? My 94 didn't have this sensor, this sensor is just forward of the rectangular sensor that I am used to normally seeing.

The other air tube connection is coming out of the bottom of the round sensor, where does this connection go?

Thanks
John

 

This one?




Shboxes website is a great resource for pics and diagrams. Check it out.

http://shbox.com/page/index.html

 

edit: nvm got beat to it.

 

http://shbox.com/1/1996_evap.jpg #11 is a switch obd1 did not have.

 

No not that one, that is the rectangular one I was used to seeing. On 97's there is a round sensor in front of that one with another electrical connector.

Thanks though, wasn't aware that sensor went to the evap canister.

John

 

Yes!! #11 is the switch I am talking about, what is it and what is its purpose? Also where does #15 go?

 

OK figured it out, #11 is the vapor canister purge switch and #15 is the fuel tank evaporator control.

And #15 doesn't go anywhere, it is a vent.

Thanks for the help
John

 

It connects to nothing it's just a vent tube. Yep thats it.

 

11's purpose is to monitor the vacuum in the EVAP hose, so it can tell the computer if it is working as it should. This was required for OBD-II and OBD-I did not have it.

7 is the EVAP canister purge solenoid.

15 is a vent hose (just like it says on the diagram)