i have an ef and it has a vialle converter on it and the stepper motor has been removed and an older style gas flow valve fitted.
however the valve doesnt seem to work and was just wondering iff there was another type of converter i could run or is there a nother way of controling my gas flow. thankyou

Get another stepper, about $120. If you change convertors you will still need to control the vapour flow rates to meet ADR's somehow, might as well stick with the Vialle unless you are thinking GRA carb.