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Date: Sun, 08 Apr 2012 22:37:13 -0400
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Subject: Engine "surge" issue
From: Berni Breen <bbreen@cableone.net>
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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?

Berni

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Whenever my GAMI injected IO360 powered Lancair 360 is really heated up, fo=
llowing a flight and only a short time to cool down (less than 30 minutes) =
and restarted, the engine will surge during idle and taxi. =A0Again this on=
ly happens when the engine is hot, has been shut down and restarted. =A0The=
 issue never occurs when the airplane (engine) is started for the first tim=
e on any given day (super hot day or super cold day).<div>
<br></div>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. =A0Th=
e engine runs very badly with a pronounced surge. =A0If 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 engin=
e just about quit 2000&#39; into my takeoff roll. =A0I aborted the takeoff,=
 did some high speed taxiing and then took off 3 minutes later (no shutdown=
).<div>
<br></div><div>Today I took off, climbed aggressively to get the engine goo=
d and hot and landed. =A0I shutdown, let the engine sit for about 10 minute=
s, restarted and once again experienced the surge during idle and or taxiin=
g. =A0I removed the upper and lower cowl but am still not able to identify =
the cause of my issue.</div>
<div><br></div><div>Clearly I have an issue that is caused by heat affectin=
g fuel. =A0All of my fuel lines are heat shielded. =A0Can anyone offer sugg=
estions or ideas that I can try?</div><div><br></div><div>Berni<span></span=
></div>

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