Hello Volks!

I have this problem for some time. The problem is that
it doesn't occur frequently enough to easaily analyze
it.

Description: The motor just turns off and refuses to
restart.
The motor isn't cold (been driving at least 10
minutes. Cold start was easy).
I notice that it's probably not a fuel problem because
the exhaust smells of unburnt gasoline.
I also hear the fuel pump turn on and off right after
I switch the ignition, as it should.

I usually play with the AFM connector, remove and
replace the HT wires from the distributor, etc. to no
avail. Somehow, after a few minutes the motor
restarts. I've been to the dealer but they don't have
the proper equipment to analyze the motor anymore
(i'ts been discontinued since 1992).

Of course I was suspecting the AFM (= vanagon
syndrome), but if it was that then turning the
ignition switch off and on again would have reset the
ECU and restarted the motor immediately AFAIK.

I've also heard about bad chasis ground connections.
Still, the problem goes away without touching them.

I still have to make sure there's a spark when the
problem occurs (every time, by the time I finished
playing with connectors, the motor would restart, so
I'm not sure). I've now got a spark sensor, will try
when problem re-occurs.

Anyway, I need new ideas to debug this problem. Looks
like the ECU isn't getting some input it expects, thus
disabling spark generation.
Any other reasons except for the erratic AFM issue?
I would have loved to build the digitool mentioned
here, but I am afraid to open the ECU to add the
external flat-cable - a simple mistake might leave me
with no ECU at all...
Anyway, most digitool inputs are avaialable elsewere
in the wiring harness, so I'll go that route.

So, ideas, anyone?

=====
Cheers, T-man.

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