Might have used sealant or Teflon tape on transducer threads. This can cause the transducer to fail. Do not use teflon tape, or thread sealant compound of any kind. [ See #503 Fuel Flow Installation Manual - Heading #2 "Initial Check Out" -- line item #14.]
Check that the transducer harness wiring is not routed with or adjacent to ignition wires, alternator wires, spark plug leads, or cabin heater ignition wires. Also check connections and crimps.