Question about Volkswagen Passat
First and foremost check the gas tank filler cap area, open the filler door and check by smell if the fuel cap is not sealing this will almost always happen as the fuel tank system is under pressure and needs to be sealed, all vehicles have a fuel evaporation system now built into the vehicles fuel systems, also look under the hood by physical observation for any signs of fuel leakage around any of the fuel lines etc. also check under the vehicle for any signs of fuel dripping, if needed have the vehicle put up on a lift so it can get a good going over as this may become a bit more serious if something God forbid triggers a spark and ignites the fumes from the assumed fuel leak.Generally defective neoprene rubber fuel line hoses can cause this condition especially if they are a few years old, cracking and drying up, also inspect under the vehicle, it is possible to have a crushed fuel line that has happened while driving on a roadway and an article comes up from the road and hits the bottom of the car rupturing the fuel line that run from the fuel tank to the egine, generally this fuel line runs alongside the frame of the vehicle on the same side as the fuel filler cap.
Hope this helps.
Posted on Jul 15, 2010
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Posted on Jan 02, 2017
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