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Old 05-13-2018, 11:59 AM
dweyant dweyant is offline
Join Date: Sep 2012
Location: 07TS
Posts: 456
Default EGT Probe

Started having an issue with the EGT's on my number 3 yesterday.

RV-9A with IO-320 about 400 hours TT.

Cruising along at at 7500 feet LOP and the EGT would bound up and down bout 200-300 degrees.

I pulled to probe today and there is nothing obviously wrong with it.

Bad probe? Or something else?


Dan Weyant
Done and Flying 4/30/2015
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Old 05-13-2018, 12:22 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 1,892

Depending on the vendor and vintage, some EGT probes have a problem with the pigtail connectors.

Before buying a new probe, you can try replaceing the pigtail connectors.

I keep a spare probe in the hangar as they do go bad from time to time.

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Old 07-15-2018, 09:47 AM
kaweeka kaweeka is offline
Join Date: May 2011
Location: Roseville
Posts: 263
Default Replacing EGT Probes....which one?

I used my existing EGT probes when doing my panel upgrade to the G3x. They are the type K that came with my Dynon and have lasted about 600 hours. From what I read, that is a good life. My #2 is going whacky and I already replaced the connector thinking that was the problem. Not so. My question is.... with all the various type K probes I see on ACS website, which one to get? I plan on replacing all 4 and would like any input as to which ones people have experience with.
RV-9A N435KR Vans calendar March 2018
IO 320 B1A, Dual LS Plasma III, AFP injection
G3x touch
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Old 07-15-2018, 09:52 AM
mike newall's Avatar
mike newall mike newall is offline
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 1,717

All of our Dynon probes have burned out after 400 hours - just replaced them all.

Correct placement and we run to standard temps when leaning.

When we had strange readings I queried it with Dynon and they said they wear out.
"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q

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