well the Lane A light flashing today and the timing is pretty clear to be the top on the log. Again it is not clear that this is. Scheduled this weekend. Any one able to diagnose? I will sent to Lockwood and California Power but typically on weekends they do not respond.
latestLaneAflashing2019-05-24.jpg (You do not have access to download this file.)
To my mind, it is pretty clear that it is a fault related to the #1 Cylinder Exhaust Gas Temperature (EGT)
The reference to "Ïnjection Fault" probably indicates that one of the #1 Cylinders Fuel Injectors is having a problem and is causing and Overly rich or lean condition resulting in the EGT Temperature to be significantly different from the other three.
It appears this has occurred on at least 5 previous flights where a "Substate Test A" was "Initiated".
I will assume the system defaulted to Single Fuel Injector operation to isolate the problem without results due to the intermittent nature of the problem.
This time it detected an "Injector Error on Lane A".
It could be a bad injector or it could just be a coincidence that it glitched again during the "A" test.
Start Simple and work up.
Verify that the wire connections to the Cylinder #1 Fuel Injectors and the EGT Sensor are secure.
Swap the EGT Sensor with one from another cylinder.
Go Fly.
If the problem disappears, it was a marginal Connection.
If the problem moves, it is the EGT Sender.
If the problem reappears on the same cylinder...
Inspect, Clean or Replace the "A" Fuel Injector.
And while I can understand your frustration at not understanding the problem; Be reassured that at least you know there is a problem that in a conventional engine you would not even know existed until you suddenly found yourself flying on three cylinders!
Bill Hertzel Rotax 912is North Ridgeville, OH, USA Clicking the "Thank You" is Always Appreciated by Everyone.
My educated guess is that Cylinder #3 EGT Sensor is Failing.
It could be the sensor or a connection.
Failed HIGH likely means it showed an Open Circuit condition.
A cracked wire within the sensor that Opens as it cools would be an explanation.
Swap the sensor with another cylinder and see if the problem moves.to the new cylinder.
Bill, Failed High showing an open circuit condition is most helpful. Hopefully it in in the sensor and or sensor wire and not on the other side in the wiring harness. It is probably cheaper to just buy one and install it hoping it is in the sensor or sensor wire rather than try and switch out to trouble shoot.
Thanks again very helpful will provide results.
Added may 25 2019 PH. To follow up on this I bought a new EGT probe and swapped it out. The old one looked pretty bad inside the exhaust I am not surprised it was reading bad. Since I swapped it out it has been running fine. Thanks Bill.
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