Stormy

David, Is the gear check tool available? How much do you get for one? Stormy

Skip, We found knife splices on the three wires coming from the transducer, only a few inches from the transducer. That is what we reworked. Wires out of those went to the JPI and the FT101. But, we didn't touch those. Stormy

We reworked the electrical connections to the transducer and the issue resolved. I wouldn't have thought that loose electrical connections could have made FF go high. I am guessing a loose power or signal wire would have flow indication go low - or to zero. But, a loose ground wire might have been the culprit. Thanks again for all your comments. I will continue to watch it, of course. But, it seems to be working correctly after an hour of operation.

Thanks. It was working perfectly for the first two years I owned the plane. On occasion, I have seen it change to a reasonable number for a minute. So, I don't think the K factor is off. Once set, it should stay set - I think. That is why I am looking for failure modes of the transducer that would change the value. If it were a bad electrical connection, I would expect it to go to zero, not 2X. I wondered if there is a return FF transducer that might be going to zero, perhaps doubling the indicated FF. But, I think my 1984 M20K has only one transducer downstream of the fuel pump.

I am five years late on this topic. My fuel flow indicates high, about twice what I'd expect. That makes the JPI think I have far less fuel than I do, along with dire warnings of impending doom. I have verified that actual fuel flow is normal, and I am not losing fuel overboard. I am guessing transducer. JPI and FF display are showing an identical number. What makes a fuel flow transducer indicate too high? I wondered if air is being sucked into the fuel line through the selector valve. But, if the leak were big enough to allow air in, surely it would be allowing fuel to leak out when the aircraft sits.