15 yrs at driving a Vanagon and do my own work, yet this has me stumped.
Recent loss of pwr while at highway speed. Acted as if it may be a fuel
filter and I replaced. Immediate improvement. Happened again a few weeks
later and left stranded on road side. Always have spares of pump and
filters, as I am often where they can't be found. When I took pump off,
inlet was clogged with sediment. Definite time for tank replacement and
did so. No luck. Would crank and fire, just no fuel. Looked under to see
that tank had sucked up in a concave manner, so took line off and blew
out with air hose to pop back in shape. Would then start, but run for a
few seconds and die. Tried with gas cap off, etc. took all fuel lines
loose and blew thru them. No fix. Bench checked fuel pump and it
pressures right up. Could the fuel pressure regulator valve been trashed
with the suction that caused the tank to collapse? Something is not
letting the system pressure equalize as the fuel level drops is all I
can think of. Any ideas?