All air tanks full no secondary pressure

What is your primary air pressure at? I believe crack pressure is 94 psi

 

Bypassing the manifold? It's not still bypassed is it? There will be internal passages in the manifold that lead to the air lines that go to your gauge, seat air, tranny, etc.

 

Are you still bypassing the manifold? Then you aren't supplying air to whatever was leaking. Plug it all back together and find the leak. If it's the manifold itself then you'll have to replace it. Make sure you take pictures of the lines first if you do.

 

Ouch! Cheap Chinese junk. I'll be glad when it's all gone.

Back during covid I had trouble finding a quick connect that I needed so I ordered an assortment kit from Amazon. I've had two of them literally blow apart going down the road. I ended up throwing the whole box away.

For next time order a set of these...
Lisle 42400 Airline Disconnect Set, One Size, Factory