I would first check the valve adjustment as well as compression, the compression test will tell you if you have compression 130 psi minimum. Don't care what you do for if valves are badly misadjusted or compression is low it will not run correctly. The diaphram on the right side is the air bleed valve, if that diaphram is ruptured or has a pin hole in it your buggy will not want to run. Also note that some also have a small o-ring under the cover and if bad will cause a vacume leak.
TOM
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