jj13
Active Member
I need help on this one. This started about 2 months ago. My number 4 Cylinder's EGT started ruining about 150 deg. higher lean of peek than normal in an oscillating manner. See data chart.
What I've done;
Replace EGT prob
Replaced both spark plugs
Replaced both ign wires
Switch injector with Cylinder #2
The engine runs perfectly smooth. Max speed has not changed.
Climb out is normal for all 4 EGT temperatures. This only happens lean of peek.
But at startup the #4 EGT is about half (500 deg) vs (1000 deg) on the other three. At runup #4 catches up with the other three.
Any help would be greatly appreciated.
Thank you
![N1354J EGT N4 Issue.jpg N1354J EGT N4 Issue.jpg](https://vansairforce.net/data/attachments/26/26938-dc0b028352d7031cd1c74da1f2177053.jpg)
What I've done;
Replace EGT prob
Replaced both spark plugs
Replaced both ign wires
Switch injector with Cylinder #2
The engine runs perfectly smooth. Max speed has not changed.
Climb out is normal for all 4 EGT temperatures. This only happens lean of peek.
But at startup the #4 EGT is about half (500 deg) vs (1000 deg) on the other three. At runup #4 catches up with the other three.
Any help would be greatly appreciated.
Thank you
![N1354J EGT N4 Issue.jpg N1354J EGT N4 Issue.jpg](https://vansairforce.net/data/attachments/26/26938-dc0b028352d7031cd1c74da1f2177053.jpg)