[Gaz64]

Hello Paul,

Your PCV valve fitted to the passenger valve cover is a restriction to blowby gas when the engine produces more blowby under load.

Pull the valve out, and blow through it from the valve cover end, then compare that to a hose of the same diameter.

Your system appears to vent the engine to a catch can, which is vented to the atmosphere with a K&N filter, which is a very common way of allowing the crankcase to be vented.
Because it is vented to atmosphere, it is not classed as a PCV system, since the engine is not consuming the crankcase gases.

So, in a nutshell, there should be free flowing hoses without PCV valves fitted in your system.

Hope this helps.

Gary