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Old 08-15-2008, 08:46 PM
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Join Date: Sep 2005
Location: Los Angeles, CA
Posts: 47
Voltage expect at the idle valve on 104.980 engine?

I tested the idle valve: under 12V it open fully and its resistance is about 8 ohms.
Now I'd like to check if the ECU is sending correct information to it: what kind of voltage should I expect on it, when:

- ignition is On, engine is Off?

- engine running, engine temperature cold (just started 70 F), on average (I know it must be fluctuating)?

- engine running, engine temperature reached operating temperature, on average again?


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Old 08-18-2008, 09:08 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Not really a voltage signal but a duty cycle reading.

That uses a 30% duty cycle. Only when running.

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