May have been wrong all along

[rrauscher at nni.com]

Sync is when the injector(s) fire coinciding with a distributor
reference pulse. Async is when the injector(s) fire at an 80Hz
rate. This coincides with the ECM minor fuel loop code.

Sync is used 99% of the time. Async is used when the desired
sync pulse is too short to be accurately metered. The pulse
widths for min's, max's, switching between the two are all in
the code (or data tbls).

Then there is the quasi-async pulsing. This is when both sync
and async are taking place together. Such as pump shot.

This is how the '747 & '8746 handle it. Others may vary.

BobR.


>Can you explain this "synch" and "asynch" operation ? (When you have
>time...)
>
>Lyndon.
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