Petrol Gauge going up

Started by vdubdave, September 17, 2017, 09:26:03 PM

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vdubdave

I've got a weird problem - I was driving Saturday morning with about 3/4 of a tank of petrol in the super 4 motion.

And as I drove west out of Auckland the fuel gauge slowly went up not down...
So I stopped and undid the petrol cap, and the level fell to 1/2 (like it should have done)...

Hasn't happened since (but I've not quite screwed the cap on fully)..

So - any ideas what could be pressurising the tank?
Also - how is excess pressure normally vented?

Probably have a stuck valve...
82 GTi Cabriolet EG engine
82 GTi Pretender PG engine
03 Supercharged V6 24v 4 Motion

spooln

Weird. But if your tank is self filling share that trick around!
77 CS1 Fiat Spider. 78 Mk1 Scirocco. 83 Mk1 GTI. 12 Abarth 595C Competizione. 18 Golf R. 20 Kodiaq vRS