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Old 05-24-2008, 03:14 AM   #133 (permalink)
Mr. Cheap
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Join Date: May 2008
Location: Central New Mexico
Posts: 18

Bun - '02 Ford Focus ZTS
90 day: 31.3 mpg (US)
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Quote:
Originally Posted by mosier View Post
What kind of readings did you see?
I didn't record instant measurements from the caravan but I do remember seeing 20,000 to 30,000 uS at lower engine speeds. I did record 19.234046 seconds of injecting, 38222 injection cycles, and 70429 vss pulses over a 4.5 mile, 10-12 minute trip.

19 sec / 660 sec = 2.9% duty cycle
19234046 uS / 38222 injections = 503 uS / injection

At idle the focus generates a 3mS pulse every 172mS. 1.7% duty cycle.

Reading this thread I would assume that your car uses "peak and hold" injectors. Maybe the "peak" part of the injection cycle is being measured while the "hold" is not?
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