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I am inquiring for the first time over this listing.  I have a Lancair IV P
that was built using the Neico fuel selector valve provided with purchase of
the kit.  I have discovered that at altitude (>FL120), under pressurized
cabin conditions, that if I switch tanks using it I suffer a temporary
engine stall that can last for a few seconds.  We have tried various
remedies such as tightening, checking lines for leaks and taking flex fuel
lines and where they are looped up, lay them flat so they don't accumulate
air at their tops.  Some how, it seems air was getting in the lines that
wasn't showing up until the tank is selected after flying to altitude using
the other wing tank.  A fellow builder of a IV P discovered that when he
checked his fuel selector valve he discovered a leak and switched out to an
Andair, LTD fuel selector valve and it fixed the problem that he was also
having.  Checking with Lancair, they now have different fuel selector valves
in stock.  Anyone else had a similar experience?  I am interested in what
make and model of fuel selector valve to go with as I am considering
replacing the fuel selector valve in my IV P whether I can find a leak or
not.  The belief is that it is letting air in the unselected wing in flight
and pushing the fuel back thru the line back to the wing under pressurized
conditions.

Thanks,
Ben.

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