No throttle after using INPA, M73 V12

[Jamesbond740il]

I have also seen that happen when you reset adaptations in a certain order. In some cases it matters which adaptations are reset first

[daytonatrbo]

Clearing the EML is just reading and clearing the stored malfunction codes.

The "adaptations" are all of the little adjustments that are stored in the DME (ECU) to make your car run the way it runs. When you reset them its like starting over fresh and it has to re-learn all of the fuel trim, position sensors, everything that makes YOUR car tick. There is obviously some "externalities" associated with this step that shouldn't happen, but are most likely (from what I've read) due to version mismatches and bad batch files.


***Disclamer: the above is based on my research an observations. If I have something wrong PLEASE CORRECT ME***

[Finn38]

Yes, i know the difference between resetting adaptations and just clearing error memories. It's just the EML bricking i want to avoid and was wondering if DME adaptation reset would compromise the EML also. No need to reset the EML it self on my car but somethimes my DME's need resetting to get rid of mystery engine light on condition without any error codes. Happens once or twice a year for no apparent reason.

[mboor]

I just did the same exact thing on my 750 last night. Accidentally reset the pps / throttle body adaptation when i was playing around with INPA looking into code 8C (torque imbalance). I read this thread and started freaking out, thinking that i "bricked" the EML. I had the same codes, 50 and 51, and no throttle. i was still able to communicate with the EML. i tried relearning the pps but couldnt figure out the proceedure. Ended up taking the shuttle van home and my baby sat in the garage overnight. a few hours of google research netted me the correct relearn proceedure, and i am apparently VERY LUCKY. it took me about ten mins this morning to relearn the throttle bodies, she fired up and i drove her into the wash bay for a good cleaning. I will NEVER erase the throttle adaptation again.

Just incase anyone is wondering about the relearn process:
switch ignition on, use INPA and navigate to the pps relearn screen. hit F4 to learn, press and hold gas pedal all the way down for 5 seconds, release for 5 seconds, press all the way down again for 5 seconds and release for 5 seconds. hit F10 to go back, clear codes and turn ignition off for 10 seconds. turn ignition on and start engine, drive away (hopefully) happy.

Just goes to show that a little bit of knowledge can be a dangerous thing....

[DUDMD]

Yes, I have reset mine numerous times and still will reset at least a few more time again (I need to raise my speed limiter, and I will)

[BMWpower7]

Hi DUDMD, How do you think what the maximum speed without speed limiter can be achieved by these 750's?

[mboor]

DUDMD, Now that im finally getting the 750 sorted out..... how are you comming along with the M73 tune?

[DUDMD]

DUDMD, Now that im finally getting the 750 sorted out..... how are you comming along with the M73 tune?

The process of the tune is ready, I'm working on the actual mapping of the fuel/timing tables. My car is delaying it slightly, since I have occasional misfire codes and car runs really rich over 4500rpm (with factory tune), so I have to sort that out first. Just changed spark plugs today, distributor caps and rotors. What a pain that job was, especially plug #6, 11 and 12. Had to have my brother undo plug 12, since his forearms are smaller and fit better, lol.

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Unfortunately, if I can successfully change the speed limiter from 130mph, it will be to 155mph. Even the Alpina version of the EML is limited at 155mph. I can figure out the software side to turn it up even higher, the issue is I have to find a way to read the factory file and write new modified version of it after editing it.

[daytonatrbo]

The process of the tune is ready, I'm working on the actual mapping of the fuel/timing tables. My car is delaying it slightly, since I have occasional misfire codes and car runs really rich over 4500rpm (with factory tune), so I have to sort that out first. Just changed spark plugs today, distributor caps and rotors. What a pain that job was, especially plug #6, 11 and 12. Had to have my brother undo plug 12, since his forearms are smaller and fit better, lol.

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Unfortunately, if I can successfully change the speed limiter from 130mph, it will be to 155mph. Even the Alpina version of the EML is limited at 155mph. I can figure out the software side to turn it up even higher, the issue is I have to find a way to read the factory file and write new modified version of it after editing it.

pardon my ignorance, are you working on custom tunes that can be burned to the factory dme?

thats pretty awesome. The last car I had that actually needed tuning needed a piggyback because the ecu was read only.

[DUDMD]

pardon my ignorance, are you working on custom tunes that can be burned to the factory dme?

thats pretty awesome. The last car I had that actually needed tuning needed a piggyback because the ecu was read only.

Yes. Only 97 and up 750ils can be tuned. All 740 models are no problem.

Sent from my iPhone using BF.com

[kahlilj]

Try doing this

Turn the key on but don't start engine. Leave key on for 30 seconds. Turn key off then start engine. It should adapt the throttle body.

Tonight I experienced the same thing as the OP. I used INPA for the first time on my new e38 to read an error code, after exiting the read memory module. I clicked on erase adaptations (by mistake). after shutting everything down (INPA, cable removal, laptop, batt charger removal, ..) I started my car and noticed it was idling rough & continued to do so for at least a minute. It never smoothed out, so I tried driving the car a short distance on my street. I put the car in manual and all gears including reverse, but there was no response to the gas pedal. I returned home parked it, came in & researched my problem on here & saw this thread and all the suggestions. I started with the one above since it was the easiest & least impactful. Voila it worked.

My next choice would have been the battery nap method, but no need. I love this forum!

[BOBS750il]

Tonight I experienced the same thing as the OP. I used INPA for the first time on my new e38 to read an error code, after exiting the read memory module. I clicked on erase adaptations (by mistake). after shutting everything down (INPA, cable removal, laptop, batt charger removal, ..) I started my car and noticed it was idling rough & continued to do so for at least a minute. It never smoothed out, so I tried driving the car a short distance on my street. I put the car in manual and all gears including reverse, but there was no response to the gas pedal. I returned home parked it, came in & researched my problem on here & saw this thread and all the suggestions. I started with the one above since it was the easiest & least impactful. Voila it worked. My next choice would have been the battery nap method, but no need. I love this forum!

I've done this a couple times and got it back without using INPA. I turned the key on with the engine off. Pressed the pedal fully down for 5 seconds then let off for 5 seconds. Did that twice then keyed off for 10 seconds. Started the car and all was good. But I would also recommend not resetting the adaptation if it's not necessary.

Sent from my iPhone5s using BF.com

[1999750il]

Hi team,

Sorry to dig up such an older thread but Ive been having similar issue on my 1999 750il.
After using an Autel 908TS scanner...to test ABS on my car...I have a constant SES light and the car has a severe lack of power...like running on 6 of 12 cylinders.
In an attempt to clear the SES light...I reset the DME adaptations on both DMEs as well as the Tranny (AGS) adaptations. The SES remains on after flashing 6 times after start up and it seems to drive on 6 cylinders. The only error code is torque imbalance.
I took the car to the dealer and they claim they were not able to read ANy data from DME 2 so they swapped the DMEs and reflashed both but still not able to read DME #2. They claim to have checked the ground wires and verified that both throttle plates are moving. The car was running fine prior to my using the Autel scanner to test the ABS system. The car also has had extensive repairs such as 2 new MAFs, new plugs, wires, rotors, caps, all 4 o2 sensors.
Does anyone have an idea of what can be causing this issue with the severe lack of power and the fact that the dealer is unable to read DME #2 even afrer swapping it and reflashing it?
Is it possible that the dust cover for the 16 pin connector inside the cabin NOT being in place could have an impact on the 20 pin connector under the hood and cause the dealer scanner to not read DME#2

Thanks all for your help
Rick

[Tirgovetu]

I know that is an old thread but I'm in trouble!

1999750IL did you ever managed to find a solution, I have the exactly same problem caused by the exact same diagnostic tool by doing the same operation?!

Thank you

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Hi 1999750il, how can I contact you directly?! Thanks

[1999750il]

Hi Tirgovetu....I ended up taking it to the dealer and they took weeks to even figure it out....and they wanted to charge over a thousand dollars...I argued the amount of time they put into it and got it reduced to $400. Good luck...these cars have a complicated DME system

[Tirgovetu]

Thank you for your fast reply. So they just had to reprogram something and they didn't changed any part? Thank you again

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In my car I can access both dme, but the one for bank 2 just looks like the engine is off, I can read parameters, and I see fuel pump off, ignition and spark off... I can see maf values and temperature values...

[Timm]

Have you tried this:

• Turn key to position 2 ON (do not start engine)
• Step on the throttle pedal down (all the way down)
• Hold it there for 30-40 seconds.
• With throttle still down, turn key OFF.
• Release throttle.
• Wait 2 minutes.
• Start car normally. Done

There are a few different combinations that work - but try this one first

[1999750il]

Hi Timm...thats good advice. Is it advisable to do this if your car is not having any issues?....or can it potentially cause issues? I guess this clears memory and allows both throttles to synchronize?

Thank you

[Timm]

Not worth doing unless something has gone wrong or if some part of the EML system has been fiddled with.....

[1999750il]

Thanks for the quick reply Timm. How would you test to see if both throttles are fully opening when gas pedal is fully depressed? I guess having the key turned to position 2 and engine NOT running and then having someone pressing on gas pedal while looking at the throttles?

Thanks again for all your help

[Timm]

They do not fully open until the engine is under load - the only way to test is to have diagnostics running while you are blasting away - and that's dangerous!

[1999750il]

Thanks again for your quick reply. I had tried depressing the throttle all they way while key in position 2 and engine not running...and you're right....the blades do not open all the way. At first I thought there might be something wrong with the calibration so I decided to ask the expert.

Thanks and stay safe

[Tirgovetu]

Thank you for your help, this evening when i'll get back home i'll try to do this, but i don't think that is my problem. Is there anyone that have a link for a good working inpa software? It's almost one week that i go to sleep at 3 in the morning because trying to intall inpa, and even those that i payed for are not working. I would like to try and do the dme and ews synchronization.

[Tirgovetu]

So the gas pedal trick didn't work but i managed to have inpa working and with inpa on one dme found a fault code regarding dme ews synchronization, did the synchronization in 2 mins and no it's working. Thanks everyone for your help.

[Timm]

That's great news!