The ECU is deeply involved with ignition in 1986 and newer model
Vanagons with 2.1 Digifant. The signals from the hall unit go into the
ECU and the ECU determines the timing based on that and other factors
including the temp II sensor reading. It then pulses the coil as it
deems appropriate. The ignition coil is driven by the ECU directly.

The earlier 1.9 Digijet system has a separate ignition module that does
most of the work but this is built into the ECU in 86 and later Digifant
models.

Mark

John Rodgers wrote:
>
> Eric, welcome aboard!!
>
> First off, your ECU is not a likely culprit in this case. You have
> stated that you have fuel but no spark. The ECU controls the fuel
> injection system and is not in the igintion circuit anywhere. If you had
> any spark at all in the presence of fuel/air, you would certainly get
> some kind of reaction from the engine.
>