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Discussion Starter #1
I'm trying to use my AutoEnginuity to log the throttle actuator. I have some suspicions about how the ecu runs the throttle. I think they open the throttle more than you push the pedal to give a sense of big power at small pedal inputs.

There are like 5 different PIDs listed for throttle position. None of them ever show 100% throttle.

None of them show a direct relationship to pedal input either.

Has anyone else ever looked at this?
 

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It will never show 100%.
 

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I have some suspicions about how the ecu runs the throttle. I think they open the throttle more than you push the pedal to give a sense of big power at small pedal inputs.

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That is the general idea behind throttle by wire... It works too because most people wont go out and floor a car on a test drive, so if they go and just give it part throttle but the thing really moves they think wow, this must be one fast car, i didn't even have it floored!
 

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Are you able to see what throttle position provides the best response? Also, does it vary by gear? My MS6 seems to pull strong in 1st and 2nd, stutter in 3rd and 4th, but pull decently in 5th and 6th. Half-throttle seems to give the best response in any gear, though.
 

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Discussion Starter #6
The Butt dyno says pushing the pedal about half way down then increase as revs go up gives best power.

I'm still trying to figure out which PID is the pedal input and which is the actual TPS.
 

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Good luck, and thanks for researching it. Let us know what you come up with.
 
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Mr. Speed
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