For over a year now I have had a mechanical problem with my 85 vanagon. I
am on my third mechanic and so far no solution. As much as I love my
vanagon (when it works), I am about ready to give up. You my list mates are
my last hope.

The problem is intermittent. It could go a week just fine and then happen.

The problem - I am driving suddenly I notice the power slumps, I push the
gas nothing, the engine just not quit right away it goes into limbo for 2-4
seconds then the dash lights come on. I drift over to the side. Put the van
in park, turn the key and is starts up just fine. I usually can drive to my
destination no problem. It might be fine for three or four days and happen
again.
Once in a while the van just won't start. It cranks fine but does not kick
over. I can leave it sit for 10 minutes or so try again and it starts, runs
fine for a day or so then any of the above can happen.

The following has been done:

1) New ignition switch
2) Rebuilt air flow meter
3) New Oxygen sensor
4) New cap and rotor
5) New fuel filter (check fuel no excess contamination)