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Berni,
The fuel distribution spider has a shutoff valve built
in to positively shut down the flow when the fuel pressure drops far
enough.
(as during shutdown). Was the spider overhauled
with the servo? Maybe take a look at that valve to check that it has
enough spring force and is not sticking at high temps.
What do you see for CHT's and oil temp when you
are having this surging?
Does ambient temperature change the
problem?
On normally aspirated engines, surging is most commonly
caused by induction air leaks.
Good luck,
Mark Ravinski
IO360 1530 hrs.
Sent: Monday, May 21, 2012 4:30 PM
Subject: [LML] 360 still surging
Many of you guys have offered suggestions to help me remedy my
ongoing engine surge challenge. As a reminder...my fuel injected IO360
displays a very pronounced surge during idle and taxi following a flight and
brief shutdown/restart. The problem never occurs when the engine iis cool.
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