High vacuum in spider tank, still

["Mike Baker" <mbbaker@domain.elided>]

Hi all.  I am still having a problem with so much vacuum in my gas tank it
is deforming.

The things that I have checked;

1.  Air inlet one-way valve (ok)
2. Check valve - not sure, it blows in both directions with just a little
resistance.  The first time that I disconnected this hose, (from the tee
fitting that goes to the inlet valve and the canister) the gas tank inhaled
and popped.  Reconnected the hose and went for a little ride.  When I got
back, I disconnected the hose again and this time the hose was under a good
deal of pressure and exhaled.

The hoses in the back appear to be free and not crimped.  Looking at the car
disc, it appears the return system goes through a carbon canister and an
electric solenoid valve at the front of the car.  Could one of these systems
be the culprit?

Is there a diagram anywhere that shows this whole circuit and all the
components in it?

I suspect the check valve is bad since it doesn't check.

Anyway, thanks for any help,
Mike B
91 Spider (Rosa)
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