EGT Indication on Engine Start is incorrect

I noticed that the EGT indication on startup climbs to over 300 even before fuel is introduced on startup. To review, external power is applied, and external air is made available but not applied with the "Ground Power On" call. Then depressing the big start button opens a valve that allows external air into the engine causing rotation to begin (RPM). At 5% the throttle is clicked inboard to begin firing the igniters, then at 15% another right click moves the throttle to the idle position introducing fuel to the mix. At this point combustion will occur and the EGT will begin rising. So, you have Air, Spark, then fuel for ignition. What happens in the module, is the EGT begins to rise to 340 degrees when the ignitors are started... i.e., before fuel is introduced, so ignition has not yet occurred. The temperature rise is incorrect. It should rise after fuel is introduced and combustion begins when the throttle is moved to IDLE. It should then rise to some number (less than 455) but higher than the final idle number of approximately 340 degrees. So, it rises steadily to about 425 to 440 or so after the throttle is moved to idle, then it will reduce after that peak within a few seconds after RPM climbs above about 40-45% and starts providing "cooling air". To verify this complaint all it takes to start the engine.

heclak / community-a4e-c

EGT Indication on Engine Start is incorrect #644