hi i need one of these i comes of a pinto 1.6 weber carb, is it the fuel cut off switch?

also need a master cylinder plug if anyone has one spare

[Edited on 14/6/09 by *davies144*]

Its not a fuel cut off, it's an air bleed that lets lots of air in when power is removed, so stops the car running on.

Glue it in the 'power on' position and stick back in, you do not need it.