Thanks to all who replayed. I learned much about CIS, more
than I could find in the manuals. But the failure was different and
that easy:

When I disassembled the spark distributor I marked the exact
position to find the right timing of it.

I put all parts back according to the manual and set the
timing to that mark again. I thought, all is right, but I was
wrong.

Friday evening, just in case, I turned the distributor to early,
and the engine starts to run. The timing was more than
10 degrees too late. I found one position where the van
run on low power, but just fine for driving. I took it to one of my
friends to adjust the timing with the flash light. Now it runs
great. I have to do the final tune up during the smog check
next week.

I learned, that the manual isn't right every time. You
have to know what you're doing. The manual is a remainder,
not a law.

First result is, that the engine is not as noisy as before. This
is because some broken sealing I changed at the exhaust
manifold.

Now I have 'A Gaudi' again.

Helmut
'80 Vanagaudi