Hi guys looking for some help my ski at about 3700-4300 seems to misfire at cruising only , full throttle is fine . i already changed the plugs , cleaned the coils, checked oil level, i use 93 octane i already tried sea foam try to clean the injectors, the charger seems to be slipping i only get 7400 rpm and 54 mph full throttle any suggestions will be greattly appreciated thanks