TPS reads a max of 97, still good?
10-20-09, 07:14 AM
#3
HAILERS
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Sounds like its just fine and dandy, but depends a little on what (the device) your reading the figure with. IF your reading it with say a RTEK, then it's fine.
TPS on a series four should read one volt dc approx at idle. As you know one volt is 20% of five volts so your reading of 19% is just fine.
Then there's other devices out there like Zeitronix where at idle you should see zero (0) at idle. It depends on how the device maker set it up.
I've long forgotten what a SAFC reads, whether zero at idle of the 20%.
The 97% is no biggy at all.
TPS on a series four should read one volt dc approx at idle. As you know one volt is 20% of five volts so your reading of 19% is just fine.
Then there's other devices out there like Zeitronix where at idle you should see zero (0) at idle. It depends on how the device maker set it up.
I've long forgotten what a SAFC reads, whether zero at idle of the 20%.
The 97% is no biggy at all.
10-20-09, 07:48 AM
#4
Yes it depends whether the device is measuring absolute throttle position or relative throttle position. On modern cars there are two different OBD II loggable parameters for this that have been mandated by SAE J1939. Absolute throttle is based on a ratio of measured TPS voltage to maximum possible TPS voltage. Relative TPS is normalized such that a closed throttle is 0%.
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