drone_pilot
Well Known Member
This is pertaining to an IO360-A1A injected engine with the RSA fuel servo.
I think Gremlins broke into my hangar. I just performed a routine oil and filter change after installing silicon rocker cover gaskets and a new oil quick drain. I touched nothing else. Before re-installing the cowl I ran the engine and allowed the oil to heat up in order to check for oil leaks. After reaching 170 degrees, I pulled throttle to idle and mixture to full lean to stop the engine. The engine wouldn't stop! It just kept on purring like a kitten. No real roughness, etc. Without giving it a lot of thought, I just switched the magnetos off in order to kill the engine. My first thought was that the lean cable came loose somewhere and lost adjustment.
I checked the linkages along with the local IA. Everything looks good. When lean is pulled, the lever on the fuel servo goes all the way to the stop. A fair amount of fuel (more than usual) drained out of the sniffle valve from the sump. It had to be a fluke! Went to restart engine. It was very hard to start (which is unusual for my experience with this engine. Remember that I killed it by grounding the magnetos so fuel was still going into the cylinders since I cant get shutoff at full lean). Once started, and smoothed out, I pulled lean and saw EGTs go up. I then pulled full lean and it kept right on running. I killed the engine this time by shutting the fuel off.
I had AirFlow Performance Overhaul my servo and basically replaced the full injection system with new parts and lines, restrictors, etc. back at the start of the year.
Am I missing anything here or is this a call to Airflow to troubleshoot? I am not aware of any additional adjustments for Idle shutdown other than making sure the lean lever on the fuel servo goes all the way against the stop.
Your input is appreciated!
Ben
I think Gremlins broke into my hangar. I just performed a routine oil and filter change after installing silicon rocker cover gaskets and a new oil quick drain. I touched nothing else. Before re-installing the cowl I ran the engine and allowed the oil to heat up in order to check for oil leaks. After reaching 170 degrees, I pulled throttle to idle and mixture to full lean to stop the engine. The engine wouldn't stop! It just kept on purring like a kitten. No real roughness, etc. Without giving it a lot of thought, I just switched the magnetos off in order to kill the engine. My first thought was that the lean cable came loose somewhere and lost adjustment.
I checked the linkages along with the local IA. Everything looks good. When lean is pulled, the lever on the fuel servo goes all the way to the stop. A fair amount of fuel (more than usual) drained out of the sniffle valve from the sump. It had to be a fluke! Went to restart engine. It was very hard to start (which is unusual for my experience with this engine. Remember that I killed it by grounding the magnetos so fuel was still going into the cylinders since I cant get shutoff at full lean). Once started, and smoothed out, I pulled lean and saw EGTs go up. I then pulled full lean and it kept right on running. I killed the engine this time by shutting the fuel off.
I had AirFlow Performance Overhaul my servo and basically replaced the full injection system with new parts and lines, restrictors, etc. back at the start of the year.
Am I missing anything here or is this a call to Airflow to troubleshoot? I am not aware of any additional adjustments for Idle shutdown other than making sure the lean lever on the fuel servo goes all the way against the stop.
Your input is appreciated!
Ben