I experienced this one time when I had not advanced the fuel selector all the way open when I started the engine following a fill up with a hot engine.
From: Kevin Stallard <kevin@arilabs.net>
Subject: [LML] Re: Engine "surge" issue
To: lml@lancaironline.net
Date: Monday, April 9, 2012, 11:54 AM
We are really glad you are asking for help, and I suspect someone who understands this motor may give you a hand, but we really want to keep you around.
Please be careful. I know that you have to figure out what is wrong, but perhaps there is a way to do this that doesn’t put you in excess danger?
Kevin
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Berni Breen
Sent: Sunday, April 08, 2012 8:37 PM
To: lml@lancaironline.net
Subject: [LML] Engine "surge" issue
Whenever my GAMI injected IO360 powered Lancair 360 is really heated up, following a flight and only a short time to cool down (less than 30 minutes) and restarted, the engine will surge during idle and taxi. Again this only happens when the engine is hot, has been shut down and restarted. The issue never occurs when the airplane (engine) is started for the first time on any given day (super hot day or super cold day).
Since I feel the issue is fuel related I tried leaning and use of the electronic fuel pump during idle and taxi with zero improvement. The engine runs very badly with a pronounced surge. If I get on the runway and give the engine full throttle, the engine will develop good power and lift off as if there were no issue...that is until yesterday when the engine just about quit 2000' into my takeoff roll. I aborted the takeoff, did some high speed taxiing and then took off 3 minutes later (no shutdown).
Today I took off, climbed aggressively to get the engine good and hot and landed. I shutdown, let the engine sit for about 10 minutes, restarted and once again experienced the surge during idle and or taxiing. I removed the upper and lower cowl but am still not able to identify the cause of my issue.
Clearly I have an issue that is caused by heat affecting fuel. All of my fuel lines are heat shielded. Can anyone offer suggestions or ideas that I can try?