Sorry all, but these constant velocity carbs are driving me crazy! Question is, when the throttle is jacked open and the slides are raised, what is supposed to make them close quickly when the throttle position is fully off. Seems the engine RPM's stay high for a long time before falling off to idle speed. Is vacuum supposed to pull them down or what? I don't get the normal "varoom, varoom" but instead get a "varooooooooooooom" I know the throttle is fully at the stop, so it's not like a sticky mechanism or anything. What's up? BTW, this is on an EL250 Eliminator. I believe the EX is the same. Thanks