VRV how and where?

[13fcolt]

im thinking i may need to replace my vrv but i would like to test it first.
i have a cheap vacuum gauge but what side do i hook the gauge up too in order to get a proper reading, top or bottom? and what should it read at what rpm's? i had read all of this online somewhere but apparently i didn't bookmark it.
if i do need to replace it, where do i get one and for how much do they go for?
i've googled for a vrv but didn't find anything that even looks close.

thanks!

 

[OLDBULL8]

Just take any vacuum hose off and connect the gauge there, brake booster is a good place. Should get 25 inches or better at idle.

 

[h2odrx]

I think it is in the tech section?

 

[13fcolt]

i thought i had seen it in the tech section too but i just checked again and didn't find it.
but then again i could have been looking right at it and not noticed.