Dennis wrote:

> If the guts of the pressure regulator should fail the ~30 psi on the fuel
side will quickly push fuel into the vacuum hose fitting often even filling
the engine with fuel as one tires to keep restarting it > after it stalls
from being flooded.  ......

On a 1.9 WBX engine I pulled from a donor van that's what happened; the
previous owner had cranked the engine over and over. The engine was FULL of
gas and oil. In fact, one injector showed signs of burning (melted). Indeed
the engine was hydrolocked. I can't believe the owner didn't have a major
mishap.

Rick: since you have 2 regulators on hand, was suggesting a simple bench
test just in case either one had a broken diaphragm. Hopefully I didn't
mislead you to thinking the regulator was the cause of your engine issues.

I wish I had, but I never did "nail down" exactly what caused the excess
pressure or vacuum I found at my fuel tank. The van in question has a Jetta
engine so I checked the Jetta EVAP charcoal canister purge valve (same
function as WBX valve albeit in a different manner), swapped in a used EVAP
charcoal filter. So far, it hasn't happened again. All I could figure is
that the charcoal filter was "full" and not allowing fumes to pass and/or
not venting to atmosphere at lower connection.  (this Vanagon with Jetta
engine used to have an air cooled engine; from the factory, the canister
lower connection was not connected to the air cleaner)

Dennis also wrote:

> With an automatic power loss will usually have the tach drop 300-600 rpm
depending on speed and load.

Ok. Thanks. Thats part of what I was guessing at. And thanks to you and
David for explaining what I eluded to re: electrical fault causing engine
stall or power loss.

Neil.

--
Neil n

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