Quote:
Originally Posted by WD40
IMHO it would be more effective to disable the appropriate injector and leave the valves alone, it seems to me that by shutting both intake and exhaust valves the piston would essentially be creating a vacuum causing even more issues.
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Leaving the valves closed basically uses the air as a spring. The piston uses energy to compress it, but the air pushes the piston back down on the other side of the stroke. Leaving the valves open would waste the compression energy.