The Camper had to be checked for its CO readings last week.
It was a too high CO proportion in the exhaust and the mechanic
wanted to fix this and adjusted the CO reading by regulating
the amount of injected fuel at the CIS fuel distributor. The
idle speed was too high, and during lowering the engine dies.
First suggestion was 'Vacuum leak, somewhere' and the camper
missed the smog test.

I liked to fix the leak by myself, as I know best where the leak could
be. First guess was to check the air intake manifold. This is the
weakest thing I did during the engine swap. I took a bottle of
starter spray I need sometimes for the Diesel during winter
month. I sprayed carefully the outside of the airintake manifold,
but the idle speed didn't raise. So, where else I can find a leak?
Rubber connections at the throttle body, crank case ventilation
hoses? Then I noticed a raising idle speed when I sprayed near
to the fuel injectors. And it wasn't only one of them, all five took
wrong air. I pulled the injectors and if I compared the sealing
O-rings to the new one I bought next day, the old are hard, had
some cracks and a shrunk size. I checked the injectors seats
and I broke some when I pulled the injectors. I replaced all five
sealing and seats. Price wasn't that high, one US$ for the sealing,
another and a half for the seat, totally 15 US$ without work.

The camper was smog checked again, and the CO reading was
adjustable in the range it has to be. Even the idle is fine, on
acceleration the engine works only on four cylinders. The mechanic
explains, that running a long time on rich mixture, the new adjustment
have to be settled for some hundreds of kilometers. Then the CO
setting should be adjusted again. But lets see, what happens during
this week.

Any comments?
Helmut
'80 Vanagaudi