edgy
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« on: May 07, 2014, 07:39:38 PM »
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I have a 3B0907551G box sitting in front of me, and I really really really need a 8D0907551M instead... Can I flash this one? I believe it is ME7.1...
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
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ddillenger
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« Reply #1 on: May 07, 2014, 08:42:52 PM »
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It will not work, no.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
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edgy
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« Reply #2 on: May 07, 2014, 09:11:42 PM »
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Thanks!
Can you tell me why it won't work?
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
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ddillenger
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« Reply #3 on: May 07, 2014, 09:29:28 PM »
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Will it flash? Yes. Will it run? Yes.
HOWEVER, it will have no concept of boost control, it will misfire at regular intervals, and run poorly. The ecu's are different from a hardware standpoint.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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edgy
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« Reply #4 on: May 07, 2014, 09:36:12 PM »
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Thanks for the explanation. I was under the impression that "an ME7.1 ecu is an ME7.1 ecu is an ME7.1 ecu" - that each one was essentially the same and could be treated like a blank canvas. You learn something new every day.
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
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f1torrents
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« Reply #5 on: May 08, 2014, 01:56:57 AM »
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I just flashed a mbox file to a passat 2.8L ME7.1 ECU
I flashed fine and ran in the car.
I only test started it and never actually drove the car, or logged it.
Was just a experiment while I was bored one day.
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edgy
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« Reply #6 on: May 08, 2014, 11:03:52 AM »
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f1torrents, your response and a few other things I read elsewhere piqued my curiosity, and so I tried it.
And guess what? IT WORKS! It works beautifully! I have flashed three different M-box .bins to it and tested each one.
I first read the ECU to make sure there were no issues with it prior to flashing. After flashing the first file, I read the ECU and compared values. I found that even the Bosch hardware number had changed from 0261206113 to 0261207143 - so far, so good! I then used VCDS to map both adaptation channels and measuring blocks, and compared the maps to what I had saved from working on other M-box S4s. Next I ran output tests to make sure the N75 and N249 solenoids were functioning, all good there. Started the car, let it adapt. As it warmed up I kept my eye on misfires (there were none).
On the first drive, a pair of bad EGTs and a bad secondary O2 sensor reared their ugly heads. I swapped in some EGT deletes, but still no change, still showed short to ground... hmmm... a quick edit, remove EGTs and rear O2s, and bingo, we are in business!
Finally, I flashed a modified performance .bin and the car is boosting to 22 pounds and running strong!
I'm now curious if the DBW 30v 2.8 ECU only differs from the S4 in terms of EGT support, or if my EGT deletes are indeed bad.
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
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nyet
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« Reply #7 on: May 08, 2014, 11:34:00 AM »
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Whoa.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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edgy
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« Reply #8 on: May 08, 2014, 11:39:32 AM »
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Whoa.
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
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nyet
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« Reply #9 on: May 08, 2014, 11:59:05 AM »
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No, I'm serious, I had no idea you could do this! I assumed (like DD) that the ECU was entirely different.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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f1torrents
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« Reply #10 on: May 08, 2014, 12:37:39 PM »
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When I tested mine the turbos 100% spooled up.
It did not studder or misfire.
I ran it for a few miuutes in neutral and it seemed fine.
I will run and log it on saturday.
BTW I had deleted 02's EGT's SAI, EVAP in the file.
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ddillenger
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« Reply #11 on: May 08, 2014, 12:48:46 PM »
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I have tried this personally and had issues. Here is a link to noob Daz, who tried the same thing when he realized NA ecu's were dirt cheap: http://nefariousmotorsports.com/forum/index.php?topic=2697.0 |
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« Last Edit: May 08, 2014, 12:55:29 PM by ddillenger »
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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ddillenger
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« Reply #12 on: May 08, 2014, 12:58:33 PM »
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It's worth noting it seemed to run decent, but it DID show misfires on blocks 015 and 016 at idle, whereas the stock ecu did not.
Like I said, will it start and run, yes. Will it work properly, no.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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edgy
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« Reply #13 on: May 08, 2014, 01:14:58 PM »
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I cannot speak to anyone else's experience; all I know is what is and is not happening in my situation.
I have been working on this all day - nonstop since 9 this morning. It's now almost quarter after 4 in the afternoon, and I have yet to see one misfire pop up or hear the motor stumble. On my other S4, parked directly behind this one, I have an off-the-shelf MTM stage 3 tune, and that car racks up the misfires at idle - not only do they add up in VCDS, but you can hear and feel them. Both cars have the most recent revision FSI coils, though this particular car has the appropriate harness wired in while my other S4 has the 034 kit (what a mess).
Anyway, so far with all my runs and 3rd gear pulls and logs and butt dyno sessions, the only hiccup so far has been the TBB blowing off the throttle body once... 2 miles from home and had no tools, unplugged the MAF and she ran like a champ all the way home.
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2002 S4 full stg 3
2001 S4 stg 2
2001 TT 225 stg 2
1988 80q 4.2
2005 A4 (the wife's)
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f1torrents
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« Reply #14 on: May 08, 2014, 02:33:12 PM »
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I will do some tests and logs on Saturday.
Hopefully we can confirm if this works or not.
My initial test seemed promising.
Daz, maybe your ECU from back in the day was bad? Or something in the e2p was wrong?
We shall see...
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