how to check thermowax?
 

After I diconnected both lines I saw this yellow power and one of the lines is clogged. This is prolly the reason my engine went. Is there a way to check it, do I just take a compressor and blow air in both sides?

no one has any idea? should I take it off and let it soak in carb cleaner?

I guess I will give it a shot

The part with the vac lines is actually the thermovalve, which is attached to the thermowax. Clean it out and follow the check procedure in the FSM.

Note that all it does is hold the upstream secondary throttles closed until the engine warms up. After that it does nothing until the next time the engine's cold.