Jim P
Well Known Member
I?m trying to diagnose an EGT problem I encountered today. At 9500 I was doing some leaning to re-balance my injector restrictors (Aero Sport XP-360, injected, c/s), and noted that the #4 EGT became really erratic, bouncing between about a 50 degree range (equipped with GRT EIS 4000), then progressing to a wider bouncing of a couple hundred degrees. This progressed for some time and eventually was bouncing between about 400 and 800. On the ground it seemed to settle down a bit but during the time, CHT was normal with no indication of a dying cylinder and mag checks were fine on the ground (I didn?t check in-flight). The temp flux on #4 was actually very fast up and down with no engine roughness or other indications.
I?m thinking this is either a probe or ground issue with that probe, but wondered if there were other avenues to investigate. I'll try and swap the probes around to see if the issue moves as a first step.
I?m thinking this is either a probe or ground issue with that probe, but wondered if there were other avenues to investigate. I'll try and swap the probes around to see if the issue moves as a first step.
