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      04-28-2013, 08:59 AM   #17
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Quote:
Originally Posted by exdos View Post
I agree it's not ideal but that's the "polling rate" that the ECU yields to an OBDII datalogger using all the cars OEM sensors 4 PIDs at a time. At the end of the day, ECU datalogging gives a series of "time-lapse snapshots" which gives a very good indication of what is happening and this doesn't devalue the information in any way. The Absolute Throttle Position still starts to reduce before the redline, which explains what the OP has observed.
How do you know it's closing? You have one data point before the limiter that says it's fully open, and one at the rev limiter that says it has closed some... That means absolutely nothing.

You are however correct that it closes some in anticipation, but nothing like your graph shows.
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