get a compressor or airtank and attach a adjustable pressure gauge to the end of the hose. then clamp a peice of hose around the gauges air outlet. attach the piece of hose to the wg vac line. turn on the air source and adjust at the gauge for 12.5lbs psi or just higher and see if the wastegate pushes the rod out and holds it there until you decrease the pressure. if so its good, if it doesnt push the rod out or the rod goes back in the diaphram is bad.
do the same with the bov, but keep the bov on the chargeline. with it still on the charge line hook a shopvac to one side of the charge line and seal the other side off. turn the shopvac on in the blow direction, then hook the piece of hose coming from the air source on the vac line on the bov and adjust to 12.5lbs or higher. if the bov is good and works correctly then the valve should open and expell all the air the shopvac is pumping in, if not and just a small amount of air escapes meaning there is a rip or tear in the diaphram.

i just noticed the question has been asked a few times so i thought i would make a seprate post. ill get pics up also

Pics would be awsome!!



2004 Turbo cavalier 11PSI and blown!