live data help
Senior Member
Joined: Jul 2015
Posts: 3,627
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From: Michigan
A 19.6% throttle position at idle speed expressed as a percentage is fine. The PCED doesn't use percentage to give reference values for that one. At hot idle, the allowable TPS voltage range is 0.53-1.27 volts DC. That's the voltage divider output from a nominal 5 volt reference supply which, of course, has its own tolerance (which also isn't given, I'd assume a 1/4 volt would be okay). You can do some simple division to come up with a range to expected TPS percentages. In the long run, though, it doesn't matter what the EXACT voltage is as long as the voltage is within the allowable range. The PCM measures the TPS voltage at every startup and then performs the necessary scaling to normalize the internal value.
Now, your new 53 km/hr data is truly whacked out, assuming your scan tool (whatever it might be) is doing the math right. You're showing the same absolute throttle position as you did at idle speed, your calculated load percentage is impossibly high, and all of your oxygen sensors are reading essentially a flat line causing your fuel trims to be near the maximum possible positive values. The thing is probably running pig-rich. That is an illogical set of values.
Now, your new 53 km/hr data is truly whacked out, assuming your scan tool (whatever it might be) is doing the math right. You're showing the same absolute throttle position as you did at idle speed, your calculated load percentage is impossibly high, and all of your oxygen sensors are reading essentially a flat line causing your fuel trims to be near the maximum possible positive values. The thing is probably running pig-rich. That is an illogical set of values.
"The PCM measures the TPS voltage at every startup and then performs the necessary scaling to normalize the internal value."
From what I thought I understood a PCM adjusted voltage is a relative or learned\adaptive voltage percentage and not absolute. I think though that when the 3 or 4, depending on the vehicle, throttle position modes aren't all listed, the program is showing the PID it's receiving regardless of what the program is written to name the data as? In other words, even though it says absolute, it's actually relative or the PCM adjusted percentage as you point out. If I'm wrong about this, please explain.
Senior Member
Joined: Jul 2015
Posts: 3,627
Likes: 795
From: Michigan
Just trying to learn here and time for a couple of aspirin.
Senior Member
Joined: Jul 2015
Posts: 3,627
Likes: 795
From: Michigan
I'm not familiar with torque pro so I can't tell you but mode 6 was suppose to be hidden and wasn't meant to be for mechanic use. It was like this because although most sensors are referenced with 5 volts I don't think any sensors actually read in the full 5 volt range. The TPS for Ford is IIRC 4.5 or 4.6 volt max sensor so the actual percentage reading is based on that but the reference reading is an extrapolated percentage based on 5 volts and then further altered to learned values. The actual value is useless to the mechanics manual's numbers because the basis for the values is different. I hope I have that right for you.
Last edited by River1; Oct 6, 2019 at 03:31 PM.