Volks,

My van is exhibiting weird behaviour. When I pull away from a stop and
put my foot on the gas the van lags and the revs will not pick up.
Moreover my milage has dropped to about 200km / 120 miles per tank
full.

ONce the revs pick up the van behaves normally. The only way I can
leave a stoplight is to put it in the granny gear, take my foot off
the clutch (without using the gas). Once the revs pick up I can use
the gas then switch to first and then I'm fine.

Any thoughts?

Chris