Sending out an SOS to any and every one...

Here's a recap:

83 air-cooled Westy that ran but had no compression on
#3
Rebuilt the engine
Put everything back together and in
Refuses to start
I am getting spark to the spark plugs
After analysis, I found that the fuel injectors are
getting juice, but not the pulsing ground to power
them

I've checked wired over and over again
The grounds are connected and solid
I put my ECU into another members Vanagon and it fired
right up
I removed teh wiring harness and checked every wire
for continuity with a volt meter
I replaced the ignition modulator - same result
I have checked all fuel injection components per
Bentley - everything checks out

Any ideas??  What would prevent the ECU from passing a
ground to the injectors??

Z

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