Ok Trent, got the pics! It looks like you don't have the "nozzle" in the venturi in far enough. It must be in farther than the "opening" in your "tee" in order for it not to feed pressure into the tee. What is your reasoning in using the venturi? If it is to mix in the Methoxide why not introduce it ( the methoxide) in the Pump intake?
If you put your venturi in the pump suction side you'll have plenty of vacuum to Pull the methoxide in.

This is another reason I prefer an "open" style processor with mechanical mixing.................