Working on a friends motor. It is running on the #2 cylinder only. when taking carbs off to clean i noticed the oil control linkage that attaches to the bottom carb was not attached. there is lots of oil coming out of exhaust. My question is how to check the control box that sends the signal to the coil packs. what voltage ect. I changed the #3 to #2 coil pack and no change. so the coils are good. Would a bad stator cause #1 and #3 to not fire? any help would be appreciated