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      01-04-2013, 12:35 AM   #714
Mike Benvo
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Drives: 08 E90 M3 / 400whp Turbo 7
Join Date: Apr 2008
Location: SoCal

Posts: 4,647
iTrader: (7)

Garage List
2008 BMW M3  [5.00]
1990 BMW 735i Turbo  [5.00]
2004 BMW M3  [0.00]
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Quote:
Originally Posted by Talk2meg00se View Post
My ECU has been updated to 240E, and my ESS tune has been updated as well to reflect the new ECU.

During this process, I have learned a number of things.

Namely, for those of you out there with the ESS flash cable or equivalent, there is no reason that you shouldn't be doing this yourself. The software is extremely easy to use, and ESS is very, very helpful in terms of providing updated tunes to match the appropriate ECU. Additionally, and I wish that I knew this beforehand, but ESS will also provide you (as far as I understand) with the new ECU as well.

There is nothing particularly complicated going on here:

1. Install the software to laptop
2. Attach laptop to the car via USB cable
3. Download current version of car configuration to laptop
4. Email current version to ESS
5. ESS will return tune.mod, and if necessary, the new ECU as well
6. Install one or both
7. Drive away and be merry

I've been told before that the car battery must be attached to an external power supply to maintain constant voltage during the tune - this appears to be complete B.S. and a ploy to keep you in the shops.

Who knows, I could be wrong - but I updated ECU and Tune without an external power supply and everything went smoothly.

In any event, those of you out there with ESS e-flash or equivalent really shouldn't be going to external sources for this. PM me with any basic related questions.
Battery charger is not needed on vehicles which are not experiencing battery problems.

I rarely have customers send me their stock calibration (because I have them all already). This negates the need for the 36 minute read of the stock file.

This way it takes 5 minutes for the update, and five minutes to flash the tune. Add 5 minutes for laptop boot up, plugging in the cable, and starting the application. So ~15 minutes and the car is updated, tuned, and ready for a beating!
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