[Mgs] MGB driving me nuts

[Paul Hunt]

Firstly if the vent line is plugged you *won't* get fuel from the tank going
into the canister, because the vent line *is* blocked, although it will cause
fuel starvation.  And unless you remove the fuel filler cap you won't be able
to blow through the vent line anyway.  The easiest test for a blocked vent
line is to remove the fuel filler cap when it starts acting-up.  If you get a
whoosh of air it *is* blocked, and you should be able to start the engine and
drive off normally immediately.  But a blocked line wouldn't allow you to
drive off normally *until* you had removed the filler cap, or left it for some
time, and it would cause the same thing to happen every few miles, not once
every few days or weeks.  Even a vent line that was intermittently blocked is
unlikely to act like this.

PaulH.
  ----- Original Message -----



   One thing to check is that the vent line from the adsorbtion cannister
  to fuel tank is venting. If plugged, you can experience both lack of fuel
  and fuel being pushed into the adsorbtion cannister.