Posted for "glong2" <glong2@netzero.net>:

Charlie:

I did the check yesterday. I drained about 1/5 quarts through the sniffle
valve and did not get a drop from the manifold valve drain. I was surprised
how fast the high boost pump put gas in the manifold to the sniffle valve. I
am still looking for a better explanation than I have!

Have you ever seen a bad manifold valve diaphragm be intermittent?

This is all good troubleshooting information, thanks for your input.

Eugene Long
Lancair Super ES

"""
Actually-- It's a good hangar "floor" preflight check. There are two
drains-usually on left side by the nose gear door (sniffle valve on the
right).
One, ( the engine driven fuel pump) may drain oil or fuel-- depending which
seal is leaking. Fuel is especially bad as it is a precurser to fuel leaking
by the oil seal and filling the crankcase.

The other drain is the one in the previous post. The fuel manifold drain.
Another bad (grounding) sign.

A blue stain on the belly or a spot on the hangar floor is a sign.

By the way-- a black (oil) spot on ground under sniffle valve on hangar
floor is a indicator that intake valve guides are worn. If you pull an
intake pipe, you'll find oil inside. Time to think about a top o'haul.
"""