Evaporator

We are having warm and fine weather condition this week end in Osaka Japan.

The fuel pipe lines for fuel evaporation control must be precisely checked on VW 1302 Super Beetle, because some strange smell suffers the passengers in the cabin. As the time when the fuel supply was in rear engine room temporary treatment for the convenience, no smell was discerned, the origin of the smelling must be some portion of evaporation piping?

I've some suspicion of clogging of air discharge pipes.

Now I have experienced an unexpected stumbling that has nothing to do with fundament automobile's performances, going, turning and stopping.