o2 ecm current draw

[David Cooley]

At 01:34 AM 9/30/1999 -0400, you wrote:
>Hi
>
>I want to send false O2 voltages to the ecm. The DAC I was looking at using
>can source or sink 5 mA. Is that enough current to drive the ecm a/d.


That is more than enough current... An O2 sensor can be damaged by the 
current draw of a standard VOM so it's output is on the order of microamps.
The problem with using a simulated voltage is the ECM has to see 
transitions from rich to lean and back or it sets a code for faulty O2 sensor.

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