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Volkswagen/74 Super Beetle Fuel system


Ken wrote at 2006-07-28 20:12:21
Just a little addendum to Step “d”  

“making sure the hoses running back to the charcoal filter are correct”

In my situation the metal lines running back to the charcoal filter were completely blocked from rust within the metal lines. I had to replace all of the metal gas exhaust lines feeding from the tank all the way back to the charcoal filter.

Hint -  if you open the Gas cap and it breaths heavily then these lines are most likely plugged up and not allowing the tank to breath thereby forcing the gasses to escape from other weak seals and connections in the trunk.

Good luck


Thingdriver73 wrote at 2014-09-01 23:33:31
Check the evaporation line from the gas tank to the charcoal filter. Disconnect the line from the gas tank and from the charcoal filter. Try blowing air through it with an air compressor. Do not place your mouth on the tube!  If the the air goes through it is unplugged,if no air goes through it is gummed up. If plugged, remove the metal line. Try to run a wire through the metal line in order to find the blockage.  


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Ron Wolff


I am proficient in the following areas of VW Air Cooled Models from 1968-1979: Vehicles: Super Beetle, Beetle, Thing, Karmann Ghia, Bus, Westfalia/Bus Areas of expertise years 1968-1979 Engine Rebuild advice for all air cooled engines VW Brake system replacement Automatic Stickshift transmission VW KOOL and DPD air conditioning systems (ex. thing) Westfalia Electrical system dual battery Westy Refridge Repair Westy Cabinet Repair Westy AFC Fuel Injection system (1975 bugs) (1975 bus/Westys) Soundproofing General type 4 engine rebuild/technical data (i.e. 1.7 ltr, 1.8., 2.0) for buses VW Air Cooled Beetle and Bus Paint codes VW Distributor Compatibility Information Westy component repair Emission Systems Exhaust Systems General Electric System Door rebuild (windows, seals, vent windows) Body Panel Removal and general repair (non-welded) Charging System Convertible top Installation: Beetle CV joints Engine Troubleshooting Valve Train Non areas of expertise: High Performance Modifications Front end related components Rear suspension (spring plate adjustment) Bodywork / painting


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I often contribute to the westfalia users group technical boards. I have been a member for about 4 years. My usermame is 76Heatwagen
I restore vintage Volkswagens and currently own 4 of them.

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