I've just got into the volkswagen thing about 2 years ago. I bought my van
just before winter and stored the thing because it had never been winter
driven. When we took it out this summer we put 30,000 worry free miles on
our vanagon. Since this is our only vehicle now we have to drive it in the
winter.:( This winter has been hell for the van. First the heater motor,
then the sliding door thing, now this running on three cylinders thing! The
Vw dub mechanics here in Sudbury Ontario SUCK. I've replaced spark plug
wires, cap and rotor, fuel filters, that expensive o2 sensor. After
replacing the o2 sensor I thought the whole problem was fixed. But tonight
my wife tells me that the thing is acting up again. I don't know what else
to look for????? It seems like the engine is missing aon one off the
cylinder under load? When it rev's up to higher rpm's it seem to kick that
4th cylinder in. I will change the spark plugs, I have bosch platinum's in
the van know. I really don't want to bring my van back to the dealer. They
have cost me $500,00 in two weeks.

Ps If I can't find the problem I will have to sell our van:(:( Please help
u guys have been great in the past. I've fixed most of the other stuff with
your help but this one driving me nuts.!