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"In that case the duty is opposite what the scope reports because the duty is to open the valve (against the spring) not close it. I think maybe that's what you meant. More power to the valve means more airflow."
Yes, that is what I meant to say.
After a five day trip away from home I drove my 245 again. Being careful to apply some throttle when backing up out of the parking space, I drove for about 30 mins. And then several hours later I drove back taking a different route with more traffic lights.
The high idle state did not occur today, but I am not drawing any conclusions just yet other than that oxidation of the ECU and EZK pins seems even less likely than before.
Tomorrow I will be driving my 245 to work and then I'll be away again for a couple of days.
In the mean time the false air theory has me intrigued.
I have been around the engine bay with a combustible spray, but did not notice any change in idle speed. The brake servo also doesn't seem to be a source of false air as it only affects idle speed if I depress and release the brake pedal in quick succession.
For now idle seems to be correct. To be continued.
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