ChiefPilot
Well Known Member
I've been watching a funny EGT issue for the last couple of flights and am looking for either confirmation that I'm going down the right path.
Symptom is that EGT on #4 will go from ~1350ºF (which is within 30º of the other cylinders) up to 2000ºF over the span of a few seconds, stay there for a bit, then come back down. During this time, the engine sounds normal and other observable and logged engine parameters do not appear to fluctuate - CHT #4, for example, remains constant. The engine itself is a parallel valve IO-360 w/dual P-Mags and has run about 320hrs since new.
My first suspicion was a bad connection, as cleaning the connector seemed to alleviate the problem but then it recurred again after a few flights. The EGT probe itself looks ok (i.e. not burned away as some other pictures of Dynon probes have shown). Next step is to swap it with another cylinder.
My theory is that the probe itself is flaky, based on all other engine parameters being normal. Does that theory seem sound?
Thanks!
Brad
Symptom is that EGT on #4 will go from ~1350ºF (which is within 30º of the other cylinders) up to 2000ºF over the span of a few seconds, stay there for a bit, then come back down. During this time, the engine sounds normal and other observable and logged engine parameters do not appear to fluctuate - CHT #4, for example, remains constant. The engine itself is a parallel valve IO-360 w/dual P-Mags and has run about 320hrs since new.
My first suspicion was a bad connection, as cleaning the connector seemed to alleviate the problem but then it recurred again after a few flights. The EGT probe itself looks ok (i.e. not burned away as some other pictures of Dynon probes have shown). Next step is to swap it with another cylinder.
My theory is that the probe itself is flaky, based on all other engine parameters being normal. Does that theory seem sound?
Thanks!
Brad
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