1.8 engine pic

[veclee]

has any one got a pic of a 1.8 ecotec ive just had a chance to have a proper look at the engine since i bought and found a few things strange looking i have a loose rubber pipe on the drivers side inner arch looks like a fuel return pipe? but not sure because its not connected to any thing and a short rubber pipe coming from the throttle body with a round sensor with wires not sure what it is or does ? any ideas chaps the previous owner had removed a vacuum gauge from some where not sure where it wass connected but it runs and drives fine

[DTi Elite]

sounds like the fuel tank vent valve