LPG Moving plate mixer

[fairlane]

Hi folks

How does the moving plate mixer work.

I have fitted one to my 5.5 litre engine on top of the Holley 4 barrel carb.

I have taken a feed from the inlet manifold through the check valve to the mixer.
When I start the car the plate opens fully and stays there.  The kit did come with a solenoid for it, but the instructions are ambigious to say the least!

rob

[Ivan]

The engine vacuum causes the diaphragm to deflate, in turn moving the mixer venturi plate. The solenoid either 1).allows this to happen, or 2.) it shuts off engine vacuum and vents air into the diaphragm to allow the plate to move to the oppoite extreme. You can power the solenoid from the LPG or petrol outputs of the switch - which means it will operate automatically, but I cannot remember whether it is sucking or venting when it is powered or unpowered. It is easy enough to check this manually when the engine is running by connecting/disconnecting a live to the vacuum solenoid, but it should also be on the instructions printed on the box. The plate should be in the high position when running on petrol, and in the low position when running on LPG.

Ivan