Why doesn't my 07 corvette ever hit 100% TPS at full throttle?

[mvvette97]

Ok I pulled the rubber intake off and it does look like it's going all the way. Now with the key off I can get it to go a little more but not much. So the 88% is normal?

88% is WOT. Take your air intake off and with key on engine off have someone hold it to the floor, it show 88% and the TB will be all the way open.

[joecar]

See these posts:

ETCTP or similar I believe.

88% is WOT. Take your air intake off and with key on engine off have someone hold it to the floor, it show 88% and the TB will be all the way open.

If you log TPS %, then you won't see a value over 88% (as it is calculated from the voltage).

Log:

GM.APP - for the position (%) of the APP (accelerator pedal)
GM.ETCTP - for the position (%) of the throttle body

Both of these PIDs range from 0% to 100%.

GM.ETCTP is the throttle position pid for ETC vehicles (which includes Corvette).

[joecar]

BTW: your log file contains more than 24 pid channels... this is ok if you're just logging to view pids... if you're logging to tune then you have to limit the pid channel count to 24 or less.

[mvvette97]

Thanks man. I will go threw them and cut some of those down.

[NCRay]

An earlier quote stated "You may just have a bad TPS sensor or it may need to be calibrated if it's ever been replaced or removed for any reason."

A follow on question... Can we shade tree mechanics who put in a new throttle pedal calibrate the new pedal to the TPS Sensor without having to go to the stealer ship? Any ideas on how?
What are the chances a recalibration is really needed?

I ask this because my other non-DMax vehicle is a 2012 CTS Coupe that I just installed a set of the GM accessory Throttle and Brake pad on. I was hoping to be able to somehow be able to calibrate the throttle myself as I just do not have a local dealership I desire to go to.

[minytrker]

An earlier quote stated "You may just have a bad TPS sensor or it may need to be calibrated if it's ever been replaced or removed for any reason."

A follow on question... Can we shade tree mechanics who put in a new throttle pedal calibrate the new pedal to the TPS Sensor without having to go to the stealer ship? Any ideas on how?
What are the chances a recalibration is really needed?

I ask this because my other non-DMax vehicle is a 2012 CTS Coupe that I just installed a set of the GM accessory Throttle and Brake pad on. I was hoping to be able to somehow be able to calibrate the throttle myself as I just do not have a local dealership I desire to go to.

Its not a bad TPS, its working correctly.

[mvvette97]

I guess I won't worry about it. The car runs good and no check engine light so I figured if the tps was bad I would get some kind of code. I just thought it was strange that it never reads 100% when wide open. I even plugged in my cheapo scanner and it also read something like 89% or close to it. Must be normal I guess.