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1. 

   ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

   Yes. The temperature sender. There are two. One for the gauge and one for the ECU. When the engine temperature comes up, the ECU goes into closed loop and the fuel pump changes speed. Think of it like part of using the choke on the old carburetor trucks. If the temperature sender is giving...

   • Words: 84
   • BILT4ME
   • Post #90
   • Sep 23, 2022
   • Forum: 80-Series Tech
2. 

   ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

   I third the ignition coil and the grounding on that. The fuel pump is signaled to operate once the engine shows rotation. On the 95+ years, that is done by a crank sensor, but the 93-94 use the signal from the coil / ignitor. I don't recall the exact method, but I'm sure someone else can assist.

   • Words: 57
   • BILT4ME
   • Post #14
   • Sep 12, 2022
   • Forum: 80-Series Tech