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- #21
Also, I did a comparison of the old valve and the new one, the old valve opened right up with barely any suction. The new one had a decent amount of resistance. The old one had better flavor thoughJust suck on that valve. You should hear or feel a valve open and let air through. It's a 1 way valve. It lets air run to the vacuum off the carb plate or intake but not the other way. If you plugged the other side of the hose coming from the engine then get ready for side plate and oil pan leaks. Put the new valve on with new hose and good clamps and see if it fixes your problem. I