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I enjoy watching it, too. Let it idle for a bit afterward and drive her real slow till I feel she ready to be riden. Corvettes have a real life quality that reminds me of the west and riding horses in some abstract way.
The only thing I wait for is to say a little prayer before turning the key in hopes that the starter will not break a chunk off my engine block again... one new engine is enough!
I also wait for the gauge startup routine to finish with the thought of potential voltage drops and or spikes during cranking could generate false error codes or worse. I have seen in my computer electronics job IC devices work as intended until a voltage variation as little as 1/4 (.25V) or even less off from 5V fail. They are spec'd to run at 4.75V-%.25V but not always the case.
I was watching a "froggy" video on YouTube the other day, and he said, always wait until the gauges settle before starting the car.
Prior to that, I never heard that on Vettes.
Wasn't there a post explaining that the computer scans all the systems during the gauge sweep?
Sort of, but it's more a case of things happening at the same time. The description in the FSM implies that the gauge sweep is strictly an internal function of the IPC. I suspect that whatever scans take place elsewhere take far less time than the gauge sweep and other turn-on bells and whistles.
Also, it appears the PCM and BCM both need to be running and communicating or the starter won't crank anyway. (Theft deterrent runs through the BCM, clutch/neutral enable runs through the PCM.)
I also wait for the gauge startup routine to finish with the thought of potential voltage drops and or spikes during cranking could generate false error codes or worse. I have seen in my computer electronics job IC devices work as intended until a voltage variation as little as 1/4 (.25V) or even less off from 5V fail. They are spec'd to run at 4.75V-%.25V but not always the case.
I agree about variation in 5V being a bad thing, but I don't see how waiting another 10 seconds helps. It's not like voltage drops/spikes become less of a problem at that point.
Seat belt first then turn key and wait for bells and whistles to settle then start. Once in a great while I get the pull key and wait but not very often.