Hi
I have a new TPS sensor.
When I get current at closed throttle I get 30
When I get current at WOT I get 1020
But in MT2.25p3 I obtain 100% of TPS before the real WOT of the throttle.
How I can fix this ?
Do I need to reduce the voltage of Vref or Vtps ?
Thx
Pat
TPS ADC out of range
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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Matt Cramer
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Re: TPS ADC out of range
If you have the TPS getting 5 volts, the voltage is not the problem. However, your TPS may not have a full sweep to it. If that's the case, the only solution is a different TPS.
Although if you're running speed density, I wouldn't worry about it too much.
Although if you're running speed density, I wouldn't worry about it too much.
Re: TPS ADC out of range
Matt Cramer wrote: Although if you're running speed density, I wouldn't worry about it too much.
You're right but intellectually .... it's making an error
In fact TPS in MT reach full scale before the full scale of TBI and before the Full scale of the sensor.
Re: TPS ADC out of range
Yes of coursebleoh wrote:Did you calibrate the TPS?
30 ADC count a closed throttle
1020 ADC count a WOT
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Matt Cramer
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Re: TPS ADC out of range
Actually, it sounds like the sensor's full scale is smaller than the throttle's full scale! The only solution I can see is to get a different TPS with a wider range of motion.madman4 wrote:Matt Cramer wrote: Although if you're running speed density, I wouldn't worry about it too much.
You're right but intellectually .... it's making an error
In fact TPS in MT reach full scale before the full scale of TBI and before the Full scale of the sensor.
Re: TPS ADC out of range
hummm for me is not the sensor full scale that is smaller than the throttle's full scale.Actually, it sounds like the sensor's full scale is smaller than the throttle's full scale!
Because I read the full scale in megatune BUT full scale of the sensor is not reach.
If I decrease the voltage of Vref, I decrease the voltage of the TPS signal and match with the scale of ADC of the ecu ?
What is the maximum count for TPS ? 1024 ?
If 1024, decrease the Vref may be the solution, I think.
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Matt Cramer
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Re: TPS ADC out of range
1024 is the maximum ADC reading, and I'm pretty certain it corresponds to 5 volts. If your TPS is using a 5 volt VREF and putting out more than 5 volts, you have a very unusual TPS.
Re: TPS ADC out of range
LOL 
Unusual for sure but it is a variable resistor without electronics inside ...
I use the std 5V Vref like it was assembled in your ECU. (You sold me it in December but not I haven't finish the engine before, to test it).
I can't make any measure today I'm not at home. May be tomorrow.
The TPS datasheet is here
If I had a bad connection, TPS signal not increase and not copy the throttle position...
Unusual for sure but it is a variable resistor without electronics inside ...
I use the std 5V Vref like it was assembled in your ECU. (You sold me it in December but not I haven't finish the engine before, to test it).
I can't make any measure today I'm not at home. May be tomorrow.
The TPS datasheet is here
If I had a bad connection, TPS signal not increase and not copy the throttle position...
Re: TPS ADC out of range
Finally find the problem the electric range is smaller than the physical range ....
You were right from the start then!
Again .....
Thx for your assistance.
Now need to solve the Map Daddy problem
You were right from the start then!
Again .....
Thx for your assistance.
Now need to solve the Map Daddy problem