Cannot find a reason why the fuel tank (petrol) overflows after filling up the tank. Upon starting the engine it stops overflowing within a miute or so.
The tank has been removed and serviced but the problem persists.
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Re: 1984 VW Microbus Camper -Fuel Tank problem
If the tank has been serviced (removed and the seals replaced), I hope they also replaced the hoses.
If all that is new, I would suspect the expansion tanks in each wheel well or a goof on re-assembly.
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There is likely an issue with the vent control side of the EVAP system. I am also willing to bet the check engine light has been on since this problem started? This is a complicated system and i would recommend having a shop (either the dealer or an independent shop that you have experience with) take a look at this.
Often if you run out of petrol, you are pulling fuel from the very bottom of the tank. In doing so, you can pull in a lot of contaminants which settle to the bottom of the tank. With a car as old as a 1979, rust flakes can also accumulate in the tank. My guess is that this crud ended up in your fuel filter clogging it. Replace the fuel filter and try starting it again.
suspect it could be tank unit this is similar to a ball valve in a toilet .float arm moves up or down depending on fuel level sends reading to gauge situated in fuel tank sometimes part of the fuel pump
I had the same problem as this. There is a pipe that runs from the petrol tank around and up into the air inlet shaft under the spare wheel well. I am not sure exactly what it does I think it has an expansion valve on it. There is a join in this between two tubes that join. This is a simple piece of fuel tube with an internal dimension of say 5mm. If you feel your hand into that air shaft there, locate the fuel tube feel your way along the pipe, you will find the join. Just pull the old one out and put a new piece in. Very simple. really