Alcor EGT climbing when cold

[1bigdog]

I was getting occasional red x on #4 egt on my G3X Touch. It’s been flying for a year and in flight normal. Today red x and after a few minutes the EGT came alive and started counting up 5 degrees every 3 seconds. I reset the EIS but no change. Anyone seen this before? Obviously I’ll get into the cowl and measure the probe but why would a cold probe show incrementing with the engine off on the G3X?

Thanks.

 

[abuura]

In 16 years of using the GRT EIS and their probes, I've occasionally had a similar as well as different odd readings from the EGT and CHT probes. I almost every case replacing the terminals and soldering them on has solved the issue. A couple of times I've replaced the EGT probe.
In my case it's never been an issue with the instrument or the engine.

 

[1bigdog]

Connector vs solder

Hi David

Thanks for the response and your experience. When I made these connection using the crimped ring terminals I thought I had covered all the bases by torquing the terminal screw to spec and I shrink wrapped both connections. Clearly based on what you’re experience has shown and checking “erratic cht” on VAF this is a common enough issue.

Rather than solder I may consider the Omega connector as a permanent solution. That said. Yesterday I pulled the cowl. The slightest manipulation of the spring area and the red X is gone, temp normal. I’ll reseat the probe itself and put on a suspension point to mitigate any movement of the wire.

Thanks.