Have a 97 Mod# J175GLEUC. Gets on plane and in about 30 sec the rpms drop and the check engine light goes on. Have new plugs and wires, decarboned and in pretty good shape. Reprime bulb and it will run under 2000 rpms to make it back to the ramp. Fuel pickups are good,filter is clean. Is there a fix anyone knows of? Diaphram? VRO? arrgghh.....