Drive by Wire Throttle Calibration Procedure

[importfighter01]

Thank you for posting this @TORQUERULES and trying to share what could be helpful to those who need it. That’s what forums are all about. ?

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[TORQUERULES]

Thank you for posting this @TORQUERULES and trying to share what could be helpful to those who need it. That’s what forums are all about. ?

You're welcome. I figured "why not?" it's worth a try. I was surprised it worked, but it really did for me.

 

[Dereku]

This has been beneficial on aost every ford since the inception of OBD2. All it does is resets the maximum and minimum on the throttle body in relation to the pedal. Over time this can deaden due to the learning the computer will do, unless of course WOT is your normal way to drive.

Doesn't always do anything but if you noticed excessive sluggishness or its just not as responsive as your used to, give it a try. Only takes a minute.

 

[TORQUERULES]

This has been beneficial on aost every ford since the inception of OBD2. All it does is resets the maximum and minimum on the throttle body in relation to the pedal. Over time this can deaden due to the learning the computer will do, unless of course WOT is your normal way to drive.

Doesn't always do anything but if you noticed excessive sluggishness or its just not as responsive as your used to, give it a try. Only takes a minute.

Yep, good way to put this. Thanks. Just like you said. A minute or so to do. Why not try it?

 

[rydfree]

The thing with modern drive by wire such as that on our truck, there's not really anything to "calibrate" on the driver side. The accelerator pedal on your vehicle is nothing more than a pedal position sensor. It's a set of redundant potentimeters that receive a reference voltage from the ecu and send a return voltage. The ECU interpolates this return voltage as your pedal position. It's a fairly analog process. If anything got out of whack with the sweep of the potentiometers, there really isn't anything you could do other than replace the pedal.

Not saying it does or doesn't work, and it's free to try, but you'd figure if vehicle manufactures were including a calibration mode like this on their vehicles it would be documented somewhere in some official literature. ?‍

The transmitter sticks for my radio controlled aircraft are nothing more than a position sensor (Hall Effect) yet they are easily calibrated using a similar action . I'm curious as to why you think nothing can be achieved in a similar manner other than replacing the pedal ?

 

[TORQUERULES]

Has anyone tried it? I am curious to see if it helps anyone else.

 

[IdahoRanger]

Has anyone tried it? I am curious to see if it helps anyone else.

I will give it a try but not sure when it will get a road test.

 

[THLONE]

If it is only butt dyno then its questionable.

 

[Dereku]

The transmitter sticks for my radio controlled aircraft are nothing more than a position sensor (Hall Effect) yet they are easily calibrated using a similar action . I'm curious as to why you think nothing can be achieved in a similar manner other than replacing the pedal ?

Actually this is in the repair manual for 04-08 f150s as a post install calibration on a new pedal.

 

[Dereku]

If it is only butt dyno then its questionable.

Butt dyno is all this is. It would be like a pedal commander. No added power just more responsive pedal.

 

[RangerTX]

I did it right after doing the brake calibration with Forscan (what a difference by the way), and I swear the throttle response feels different. Obviously, its not quantifiable... But, seems more responsive. Could all be in my head. ...but isnt everything...since our perception is our reality!?!?!?! lol!!

 

[subquark]

I wasn't sure if this had ever been posted on here or not, but I wanted to share with everyone the procedure for making sure that your throttle is calibrated correctly to eliminate any dead spots or non-linearity. You'll be surprised how many of us never really had a properly calibrated throttle. Drive by wire can be really sketchy which is why many of us try to help it a little bit with tuning and something like a pedal commander.

Anyway, here is the procedure:

1. Turn your ignition on, but do not start the truck.
2. Now push the throttle pedal SLOWLY in it's full arc from no throttle to flat to the floor. Be steady. It should take you about 10 seconds or more.
3. Quickly release the pedal as soon as you hit the floor.
4. Turn your ignition off.
5. Repeat steps 1-4 two more times and then start the truck.

You should see a difference in your throttle response as soon as you drive your truck. Now if your throttle happens to already be properly calibrated and never really had any issues you may not see a difference, but many of you will.

This will work with a tune and a pedal commander type device as well. They will actually do their job better. Just make sure if you have something like a pedal commander that is turned off when you do the procedure just to make sure it doesn't throw things off. Don't worry about your tune, it will not affect that at all.

As an example I have my tunes set up to have sport mode throttle tables in all modes and on top of that I use a pedal commander on City just to find my sweet spot and to give me a little extra adjustability either way if I want it.

This procedure worked wonders for me and it should work wonders for you too so give it a try.

I can't wait to try this! Thanks for the informative post. =)

 

[navsnipe]

@BassRanger hit this dead on. As said the pedal is just a sensor that does not need calibration. The throttle body on the other hand does have an idle learn. The procedure for that I'm not sure of.

@P. A. Schilke is correct about the adaptive learning as well
The PCM learns you so if you have not changed tunes or anything else for a while there is very little chance it will make a difference what so ever.

Ford Idle Trim learn procedure. I have used this process a couple of times after noticing a rough idle.

Quoted:
Because your vehicle’s engine is electronically controlled by a computer, some control conditions are maintained by power from the battery. When the battery is disconnected or a new battery is installed, the engine must relearn its idle and fuel trim strategy for optimum driveability and performance. To begin this process:

1. With the vehicle at a complete stop, set the parking brake.

2. Put the gearshift in P (Park), turn off all accessories and start the engine.

3. Run the engine until it reaches normal operating temperature.

4. Allow the engine to idle for at least one minute.

5. Turn the A/C on and allow the engine to idle for at least one minute.

6. Release the parking brake. With your foot on the brake pedal and with the A/C on, put the vehicle in D (Drive) and allow the engine to idle for at least one minute.

7. Drive the vehicle to complete the relearning process.

• The vehicle may need to be driven 10 miles (16 km) or more to relearn the idle and fuel trim strategy.

• If you do not allow the engine to relearn its idle trim, the idle quality of your vehicle may be adversely affected until the idle trim is eventually relearned.

 

[IdahoRanger]

Didn't notice any difference in throttle response.

 

[got3fords]

I did it right after doing the brake calibration with Forscan

Brake calibration? Is this different than the ABS brake bleed?

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