Altering Electronic Throttle Rates on E38

[swingtan]

You have already posted of picture of the table......

{B2804} Is the table that maps the throttle opening rates.

[ScarabEpic22]

What you see is what you get C6Guy, change it and flash it if you want to experiment with it. Be warned, it might brick the ECM.

[C6Guy]

The table I posted earlier is not the one I'm looking for. The ones I'm looking for can be seen in this screenshot. However, I am unable to see these tables in my version of EFI Live. I'd like to know what I need to do to be able to have access to these tables.

Edit: Image removed by request.

[swingtan]

Well, if you had of mentioned that in post 1, you would have been told that that is most likely set up with a seperate calibration file called a "cax" file. It's not a std. adjustment in EFILive, but something that someone has set up themselves. Unless you have access to that cax file, you won't get access to those tables.

[C6Guy]

Sorry, I didn't have that screen shot to post until just now.

I guess I need to be educated on what a cax file is. Is there some way I can build this file myself, or is there a library anywhere of cax files for downloading? How would someone have made this file in the first place?

[ScarabEpic22]

A .cax file is an additional file that is created by the end user. But in order to make one, you need to know where in the hex code each table is, the units used, the table spacing, etc. Not something you can whip up in an hour or 2.

I see the picture has a date of September 2010, still that looks like a much older screenshot of V7.5 with the way the different calibration segments are named. There isnt even a Transmission segment (its there in all tunes, regardless of PCM, ECM, TCM) and the throttle rates are under the Transmission segment icon. As Simon mentioned, ask the owner of the screenshot if he'd be willing to share his .cax. Even then, each .cax is OS specific so unless its been built for your exact OS, not going to happen.

[joecar]

Some tables (like the one you showed) don't necessarily exist for all E38/E67 calibrations.

Where did you get that pic from, and what is the id of that table...?

Like Simon said, throttle pedal->blade function is quick, any slow down you perceive is due to other reason (traction control, burst/predictive knock control, torque management, ...).

[schwoch1]

Here is a video I posted to YouTube several months ago in relation to throttle response.

The first part of the video is what your throttle does when the table in question is maxed out at 99.9%. Notice that the throttle blade follows what your foot does. Is this what you are looking for? The second part of the video is the stock '08 Trailblazer LL8 cal running the throttle blades. THat is what you do not want!!! I was using an E67 computer for this demonstration, but from what I understand, the E38 and E67 are very similar. As far as bricking the PCM, I messed with every table that was avaliable for the ETC and the PCM still works today, no problems. I am not saying you may not brick a E38 PCM, I am saying I screwed with the ETC tables in my E67 and had no issues!!!
Hope this helps!!!

Mike

[TBMSport]

You'll want to address, among other things, your B0156.

[joecar]

Mike, interesting video, thanks.