Does anyone know what the best type of check valve to use on my map sensor, and where can i find them? I have tried a few but they have not worked.

 

i have a missing link i could sell you, that will do the trick

 

sorry, but what is a missing link

 

its a bypass valve that will eliminate check-engine lights associated with forced induction applications. It also protects your factory MAP sensor from damage occurring during high boost applications...

In theory it smooths out the signal that the map sensor reads and tricks it to not be reading positive manifold pressure