TPS Calibration Issues (Continued)
Posted: Thu Jun 09, 2022 5:22 am
This is an old topic back from the dead (my car was garaged for ~2yrs).
Vehicle is an 04 Element MT with an 05 AT ECU equipped with KTuner.
My TPS will not zero, at idle with throttle plate fully closed KTuner shows the TPS at 10%. TPS voltage is at the correct 0.5v closed & 4.5v at WOT, confirmed via DMM.
This is the same problem I was having 2 years ago before I parked the car, which started after trying a PRB tune (setup for my k24a4) then switching back to a PZD tune. KTuner worked flawlessly for 2-3 years before this point, but after the base tune switch I have not been able to get the TPS to read right again with KTuner (OEM ECU still had zero problems, while KTuner would rev hang until I came to a complete stop). It doesnt make any sense & Ive been told that it shouldnt be possible. (which I agree with, yet here we are)
Since then I have tried using a second socketed PZD ECU with KTuner, same TPS problem.
I recently upgraded from my original Rev0 board to the new board, TPS problem still present.
I installed & clocked a new TPS with DMM, and problem is STILL present.
Voltage at the TPS is equal to the voltage at the ECU, so wiring is fine.
I also installed a GReddy Informeter (via OBD2 port) and it too reports the correct TPS voltage matching the DMM voltage as measured at the ECU & TPS plug, which I believe the GReddy gauge is pulling from the ECU's data communication, so the ECU is seeing & reporting the correct voltage.
If I re-clock the TPS to drop the voltage I can get the TPS value to drop in KTuner, but even as low as 0.13v the TPS value in KTuner STILL wont go below 2%, and if I clock the TPS any lower than that KTuner's TPS value jumps up to 30% and just stops responding. (I have to cycle power to the ECU to get the TPS to start working again)
Clocking the TPS in the other direction only results in a higher TPS reading, as expected.
Literally EVERYTHING has been replaced & confirmed to be working within OEM specification. Even the old tune has been replaced with a new KTuner base tune built from the latest release (at the time, about 2 months ago), and the TPS value still refuses to cooperate. There must be a bug or something within the software, that is the only logical explanation I can come up with.
How difficult would it be to add TPS calibration to the PZD plaform? (like the PRB has)
I am trying to finish my turbo build and this is one of the last hurdles remaining.
Vehicle is an 04 Element MT with an 05 AT ECU equipped with KTuner.
My TPS will not zero, at idle with throttle plate fully closed KTuner shows the TPS at 10%. TPS voltage is at the correct 0.5v closed & 4.5v at WOT, confirmed via DMM.
This is the same problem I was having 2 years ago before I parked the car, which started after trying a PRB tune (setup for my k24a4) then switching back to a PZD tune. KTuner worked flawlessly for 2-3 years before this point, but after the base tune switch I have not been able to get the TPS to read right again with KTuner (OEM ECU still had zero problems, while KTuner would rev hang until I came to a complete stop). It doesnt make any sense & Ive been told that it shouldnt be possible. (which I agree with, yet here we are)
Since then I have tried using a second socketed PZD ECU with KTuner, same TPS problem.
I recently upgraded from my original Rev0 board to the new board, TPS problem still present.
I installed & clocked a new TPS with DMM, and problem is STILL present.
Voltage at the TPS is equal to the voltage at the ECU, so wiring is fine.
I also installed a GReddy Informeter (via OBD2 port) and it too reports the correct TPS voltage matching the DMM voltage as measured at the ECU & TPS plug, which I believe the GReddy gauge is pulling from the ECU's data communication, so the ECU is seeing & reporting the correct voltage.
If I re-clock the TPS to drop the voltage I can get the TPS value to drop in KTuner, but even as low as 0.13v the TPS value in KTuner STILL wont go below 2%, and if I clock the TPS any lower than that KTuner's TPS value jumps up to 30% and just stops responding. (I have to cycle power to the ECU to get the TPS to start working again)
Clocking the TPS in the other direction only results in a higher TPS reading, as expected.
Literally EVERYTHING has been replaced & confirmed to be working within OEM specification. Even the old tune has been replaced with a new KTuner base tune built from the latest release (at the time, about 2 months ago), and the TPS value still refuses to cooperate. There must be a bug or something within the software, that is the only logical explanation I can come up with.
How difficult would it be to add TPS calibration to the PZD plaform? (like the PRB has)
I am trying to finish my turbo build and this is one of the last hurdles remaining.