I have the problem with jerky 1-2 shift, a slight bog under harder acceleration from idle, and what I think is a lack of power at lower rpm, so while I am waiting for my Peake reader, I checked the TPS with an AutoTap scanner. Below is the trace I got while depressing the gas pedal slowly and as steadily as I could to the floor (engine off, of course).
It looks strange to me. It got to 50% very quickly, in about 1/8-1/4" of pedal travel, then increased to ~95% in about 1/3rd of the pedal travel, and then flat-lined the remaining 2/3rds of travel to the floor.
The graph also shows where I floored it 3 times. For those cases it went up to close to 100%.
Then I started the engine and raised the rpm but the scanner just read zero as I depressed the pedal, like it had lost the signal, unless I blipped the throttle, when it quickly flashed up a number, then instantly dropped back to zero.
The response to the gas pedal feels fairly normal while driving.
Any one any ideas what is happening here? Does the fly-by-wire throttle act like this with the engine off?
Thanks.
It looks strange to me. It got to 50% very quickly, in about 1/8-1/4" of pedal travel, then increased to ~95% in about 1/3rd of the pedal travel, and then flat-lined the remaining 2/3rds of travel to the floor.
The graph also shows where I floored it 3 times. For those cases it went up to close to 100%.
Then I started the engine and raised the rpm but the scanner just read zero as I depressed the pedal, like it had lost the signal, unless I blipped the throttle, when it quickly flashed up a number, then instantly dropped back to zero.
The response to the gas pedal feels fairly normal while driving.
Any one any ideas what is happening here? Does the fly-by-wire throttle act like this with the engine off?
Thanks.

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