Changing injector pulse rate at idle?

[Michael F. Sargent]

> While a slightly wandering idle speed might cause the pulse period
> to drift THROUGH the range from 40 to 45 milliseconds, what I 
> observed was a period that was EITHER 40 milliseconds OR 45 
> milliseconds, with no intermediate values. I would expect idle speed 
> wander to yield periods BETWEEN these extremes as well as the 
> extremes themselves.

Did you ever see the injector period when it was not a multiple of 5 mS?
Why I ask is that it may be that the ECU simply can not regulate pulse
period finer than at 5 mS intervals. For example, if a 200 Hz oscillator
was hooked to an 8-bit counter, you would not be able to control the
pulse width finer that 5 mS intervals.

                                          Mike
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| Michael F. Sargent   | Net: msargent at gallium.com | Phone: 1(613)721-0902 |
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