[AerBabe]

Any electricks experts here who could help us with the latest Big Red shenanigans?

When we ran the engine last year, all the engine temps were fine (except CHT #1). But when we did the shake down flight last weekend, the EGT and CHT temperatures were lower than expected. CHT #1 was broken, so we replaced it. We have cleaned the spade terminals in the harness and the connector on the Dynon (EMS D120) with WD40 contact cleaner.

When we then tested the sensors using breshly boiled water they all read around 70'C. My kitchen thermometer read 91.2'C.

The new CHT#1 has a new spade terminal, so we fitted a new harness side terminal... but it made no difference. It may be that the terminals we have are not good enough quality for a thermocouple.

The EMS has the latest software in it. There is no calibration needed or section options for CHT/EGT - they only accept J/K type thermocouples.

We think our next options are:

- Change from standard spade terminals to OLC-2 type connector. This seems to be a solution recommended on the Dynon forum. (But everything was working ok previously)
- Replace harness.
- Replace remaining CHT/EGT probes. (But the CHTs are all reading approx the same temps - including the new one)

Any ideas/advice etc?!

Thanks in advance!