Boost messed up
 

When i sometimes am moving give it wot i don't get boost then i let go and give it wot again and i get full boost so someone said its more than likely a bad check valve.. Well how i do figure out which one it is and where would i get them??

How do you test them just use an air compressor and if it blows air both ways its not working right???

You don't need an air compressor, just use your mouth and try to blow through them both ways.

Where to get replacements? Here:

Malloy Mazda
1-888-533-3400
Talk to Ray Crowe