The valve does not open so the cylinder can fill/empty so there can be no new "charge" coming in to compress...
Try sucking on a straw filled with liquid while your finger is on the other end.... You can't suck the liquid out until you take your finger off the other end....
That makes sense did leak down test intake valve leakin guess thats better than piston or rings not lookin forward too raslin that iron head off think I'll remove mstr and booster
