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Often, when starting the engine cold, the electric fuel pump does not seem to
pump any fuel.  This is the injected 360 engine and it is the Lancair supplied
$425 pump (Dukes?).  The pump is running and it sounds like it's pumping air.
After some jostling from cranking the engine, the pump will then begin to meet
some resistance (fuel) and the pitch of the sound becomes lower as it pumps
against a head pressure.  I've noticed that I can rectify the problem by
opening the gascolator and pumping out this drain valve for a minute or so.
But with time, the problem recurs.  This is all verified by monitoring fuel
pressure and flow during pump operation.  Anyone else have this problem?

My fuel system goes from the header tank through the shutoff valve through the
fuel filter (mounted on the rear side of the firewall a the level of the
bottom of the header tank), down to fuel pump (also mounted on the rear side
of the firewall - with the motor body up, per the service advisory), then down
and through the firewall to the gascolator, then to the engine driven fuel
pump.

Regards,
Ed de Chazal

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Please send your photos and drawings to marvkaye@olsusa.com.