by pappas » Fri Mar 24, 2023 11:08 am
Graeme,
That was interesting. It had very similar symptoms to the engine failure that put me in the desert in 2021. Cylinder #4 EGT went immediately stone-cold. However, I could not maintain altitude as the engine was not producing enough power for that.
EGT1 has dropped off the scale and has no EGT. - Check
CHTs are all good and normal. - Check
No undue vibration - Check
In-flight Mag check - normal. - Check
Sounds terrible. - Check
But, mine was the broken #4 Exhaust valve adjuster foot. My exhaust valve closed shut, would not exhaust the combustion remnants, and started backing up exhaust gasses and fresh fuel-air mix into the intake manifold upstream into #3. Just one big road block. I am glad your outcome was so much better than mine! Fun Game!
Lou Pappas
Phoenix, AZ
RV-7A Flying (2024)
Waiex B Turbo (2016)
RV-8 (2009)
Waiex Legacy 3300 (2007)
Hiperlight SNS-9 (1991)
Falcon Ultralight (1989)