not sure if this was posted before but Just wondering if anyone has heard of this or tried any of it?

Throttle Calibration

Throttle calibration can substantially improve throttle responsiveness over "factory standard." Many people notice what appears to be sluggish throttle response or a "dead area" at initial accelerator depression. Throttle calibration can take care of these.
1) Insert ignition key and turn to "ON" (not start).
2) Wait for all idiot lights to go out. Check Engine Light may remain on.
3) Slowly depress the accelerator pedal all the way to the floor.
4) Slowly release the accelerator pedal until it's all the way back up.
5) Turn the ignition key to "OFF".
6) Start the engine.
Most drivers notice an immediate change in throttle response, but depending on your driving style, you may need to repeat this procedure periodically due to the computer's adaptive programming. You likely need to repeat this procedure any time the battery is disconnected.


MDS Reset & Calibration

1) You need a fairly long, open, safe, straight road for a WOT run to about 35 mph.
2) Get engine up to operating temp, engine running and car stopped place gear selector in "[D]". Bump it to the Left until in "[1]".
3) Turn off all electrical accessories (except lights if needed).
4) Make a WOT run to 4500 RPM (about 35 mph), immediately remove foot from accelerator and do not depress the brake, let the vehicle coast with the throttle closed until the vehicle speed is again at 35 mph or lower.
5) Stop vehicle and place in "Park", verify all instrument cluster warning indicators are off.
6) Cycle ignition switch "Off" and back "On", but do not immediately start engine.
7) Hook up StarScan and clear DTC's
8) MDS calibration is now complete

Auto-Up Front Window

If the vehicle is equipped with the Auto-Up feature, the door module needs to be calibrated upon reconnecting the battery. This module requires calibration if the battery or door module has been disconnected for any length of time. To calibrate, perform the following steps:

1) Connect the battery cables.
2) Using the window switch, raise the window to the full UP position. Hold the switch in position for 1 second, then drive the window all the way down to the bottom.

 

what does reseting the mds do?

 

Throttle calibration is for Diesel trucks only and does not apply to the Hemi. I don't know anything about the others.

 

The throttle calibration is for all drive by wire rams.
It 'synchs up' the tpa and gas pedal positions to get the maximum range of travel.

 

As per the factory service manual:

Diesel trucks:

(6) Turn key to ON position. Without starting engine, slowly press throttle pedal to floor and then slowly release. This step must be done (one time) to ensure accelerator pedal position sensor calibration has been learned by ECM. If not done, possible DTC’s may be set.

Hemi trucks:

(c) Turn ignition switch ON, but do not crank engine.
(d) Leave ignition switch ON for a minimum of 10 seconds. This will allow PCM to learn throttle body electrical parameters.

(same for both throttle body and accelerator pedal position sensor APPS replacement)

 

Are there some models which require this and some that do not? I replaced my APPS on the 06 3500 LBQC cummins and did not do this. It seemed to run fine after changing it.

 

According to my friends on the charger fourm where i found this the throtle calabration seems to bring their hemi back to life "better response from pedal" I will give it a try see if it does anything.

here is the link
http://www.chargerforums.com/forums/...ead.php?t=8118

 

If you disconnect the battery, the MDS is disabled. The first-gear, WOT run to 35mph resets it.