Sorry, I should have made it clear that only applies to California in both Basic and Enhanced areas. Being formally emissions certified I still get updates from BAR. Details are on their website. No need for a gas cap plug as the cap is already sealed in that direction.
EVAP testing is built in and done by the ECU on OBD-II systems. Studies on Cali non OBD-II cars showed 11% failed so the law is being changed to pressure test them manually using an EVAP machine. It's a fancy form of smoke machine capable of detecting leaks down to .040 inches.
For those subject to it testing your system at home prior to going in is tricky. Pressurizing it with air is dangerous because of the explosion risk. As the EVAP machine does you should use N2 or some other "inert" gas (N2 isn't really inert but will work for this) delivered at very low pressure. I've already modified my smoke machine to use argon from my GTA welder. An expensive gas to use but I don't want to invest in a bottle of N2 I'll rarely need. That said since it's handy to have around for AC work I might do it anyway.
edit: Oops, I misunderstood. You meant a gadget to introduce pressure at the tank filler neck right? That's a good question and one I don't know. Most OBD-II EVAP systems have a port for it but on cars like ours they'll have to develop some other procedure. You're in NY so fagetaboutit....
EVAP testing is built in and done by the ECU on OBD-II systems. Studies on Cali non OBD-II cars showed 11% failed so the law is being changed to pressure test them manually using an EVAP machine. It's a fancy form of smoke machine capable of detecting leaks down to .040 inches.
For those subject to it testing your system at home prior to going in is tricky. Pressurizing it with air is dangerous because of the explosion risk. As the EVAP machine does you should use N2 or some other "inert" gas (N2 isn't really inert but will work for this) delivered at very low pressure. I've already modified my smoke machine to use argon from my GTA welder. An expensive gas to use but I don't want to invest in a bottle of N2 I'll rarely need. That said since it's handy to have around for AC work I might do it anyway.
edit: Oops, I misunderstood. You meant a gadget to introduce pressure at the tank filler neck right? That's a good question and one I don't know. Most OBD-II EVAP systems have a port for it but on cars like ours they'll have to develop some other procedure. You're in NY so fagetaboutit....
