Fit and finish of the filler neck on Bugeyes is something we take very seriously. If the neck is too high in the back deck, it can look unsightly and detract from the overall look of the car. If it’s too low? It might look okay, but it can cause your car to shut-off prematurely.
The photo above is a filler cap setup on a Bugeye in our network that quit running before returning home, and when the client went to open the fuel cap, the tank hissed. This means the tank isn’t venting properly, in this case because the filler neck gasket is blocking the underside of the cap. When the cap is hard up against the rubber gasket as shown above, the cap cannot properly vent.
If your filler neck gasket and fuel cap are touching, you will need to fix it or excessive vacuum in the tank will stop your fuel from flowing to your engine and kill your car. How you fix it depends on what fuel tank you have installed in your Bugeye.
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