Hello all.  I'm having a slight issue and thought maybe smarter minds than mine could help sort it out.  So I've been using the community stg 2 tune for my 2.7t as a break in tune for my single turbo install.  It works absolutely beautifully and has given me zero issues.   But..... If I try to modify the bin for say, less boost and more idle, the me7check finds errors, me7sum says it finds 7 errors, says it fixes 7 errors, and outputs a clean bin.  I flash the ecu, the flash says success, and so I install the ecu and the car runs just like I want.  But as soon as I turn the car off after driving, it will not start and I get errors saying checksum memory error.  If I reflash the ecu, same thing.....everything says success and the car starts. But will not restart after driving.  It will though start and restart as many times as I want after flashing without driving it.  It's only after driving the car then once you turn it off, it will not restart.

I've tried all suggested things like remove/reinstall/recheck/reflash/ect ect.  It's something strange and I can't seem to find any other instances that match what I'm seeing.  
It will run perfectly on the community stg 2 tune.  What I did was  lower the max boost and level it out and changed some idle values so it is higher.   Once I try to run a modified bin, then the same thing happens.  

Any suggestions?

And a big thanks to any and all advice!

Here is the modified bin I have been trying to run-  
I also attached a modified bin that I tried setting to 20psi.

There must something wrong with you flashtool... i know that problem... i have 4 Years ago Kess and Ktag master clone both had the same Problem.... Checksumm was all right from Software-> Ori with Licens of Winols. So it must be ur Utility for sure or wrong wrote in your MAP

Gesendet von meinem SM-N975F mit Tapatalk

OK, here's what I am seeing.   

Microsoft Windows [Version 10.0.18363.1016]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\Users\Owner>C:\Users\Owner\Desktop\tuning\tuner\ME7Check.exe C:\Users\Owner\Desktop\tuning\maps\maps\Stg2_Nef_Hitachi_Final_O2D_EGTD_CS.20psi.bin
Access is denied.

C:\Users\Owner>C:\Users\Owner\Desktop\tuning\tuner\me7sum.exe C:\Users\Owner\Desktop\tuning\maps\maps\Stg2_Nef_Hitachi_Final_O2D_EGTD_CS.20psi.bin out.bin
ME7Sum (v1.0.5) [Management tool for Bosch ME7.x firmwares]
Inspiration from Andy Whittaker's tools and information.
Written by 360trev and nyet [BSD License Open Source].

Attempting to open firmware file 'C:\Users\Owner\Desktop\tuning\maps\maps\Stg2_Nef_Hitachi_Final_O2D_EGTD_CS.20psi.bin'

Step #1: Reading ROM info ..
 Searching for EPK signature...OK
 Searching for ECUID table...OK
 EPK         : '40/1/ME7.1/5/6005.01//22m/DstC2o/011200//'
 Part Number : '8D0907551M  '
 Engine ID   : '2.7l V6/5VT     '
 SW Version  : '0002'
 HW Number   : '0261207143'
 SW Number   : '1037360857'

Step #2: Reading ROMSYS ..
 Startup section: word[0x008000]+word[0x00FFFE]
 @08038 Add=0x00013225 CalcAdd=0x00013225  ADD OK
 All param page: word[0x010000]+word[0x01FFFE]
 @01b9b0 Add=0x00971D CalcAdd=0x00971D  ADD OK

Step #3: Reading RSA signatures ..
 Searching for RSA offset #0...missing
 Searching for RSA offset #1...missing

Step #4: Finding CRC table(s) ..
 Searching for CRC table(s)...OK
 CRC table(s) OK

Step #5: Reading Main Data Checksums ..
 Searching for main data CRC pre block...missing
 Searching for main data CRC/csum blocks...OK
 Searching for main data CRC offsets...OK
 Searching for main data checksum offsets...missing
 Main CRCs:
 1) 0x010002-0x013FFE @7a866 CRC: 47443341 CalcCRC: 47443341    CRC OK
 2) 0x014252-0x017F4E @7a86c CRC: 5879293D CalcCRC: 6066DF05    ** FIXED **
 3) 0x018192-0x01FBB0 @7a872 CRC: 25DAF102 CalcCRC: 7DDB8C76    ** FIXED **

Step #6: ROMSYS Program Pages
 Program pages: 8k page first+last in 0x0000-0xFFFF and 0x20000-0xFFFFF
 @00803c Add=0xABDDC5 CalcAdd=0xABDDC5  ADD OK

Step #7: Reading Main Program Checksums ..
 Searching for main program checksum..OK
 ROM Checksum Block Offset Table @1e75a [16 bytes]:
 1) 0x000000-0x00FBFF CalcChk: 47AF0B2F
    0x00FC00-0x01FFFF CalcChk: 28DEE662 CalcCRC: 963DE673 SKIPPED
 2) 0x020000-0x0FFFFF CalcChk: 9CC25257
 @fffe0 Chk: 9CC1A12D CalcChk: 9CC25257 ** FIXED **

Step #8: Reading Multipoint Checksum Blocks ..
 Searching for multipoint block descriptor #1...OK
 1) <14224>  0x024000-0x02658D Chk: 0B08F804 CalcChk: 0B08F804 OK
 2) <14234>  0x014000-0x014243 Chk: 00540FE9 CalcChk: 00540FE9 OK (i)
 3) <14244>  0xFFFFFFFF-0xFFFFFFFF  END
 Multipoint #1: [2 blocks x <16> = 32 bytes]
 Searching for multipoint block descriptor #2...OK
 1) <1fbb2>  0x000000-0x003FFF Chk: 0FA0F5CF Boot: (whitelisted) OK
 2) <1fbc2>  0x004000-0x007FFF Chk: 0F4716B3 Boot: (whitelisted) OK
 3) <1fbd2>  0x000000-0x003FFF Chk: 0FF728A4 CalcChk: 0FF728A4 OK
 ..........
64) <1ffa2>  0x0F4000-0x0F7FFF Chk: 1FFFE000 CalcChk: 1FFFE000 OK
65) <1ffb2>  0x0F8000-0x0FBFFF Chk: 1FFFE000 CalcChk: 1FFFE000 OK
66) <1ffc2>  0x0FC000-0x0FFFFF Chk: 1FFDE002 CalcChk: 1FFDE002 OK
 Multipoint #2: [66 blocks x <16> = 1056 bytes]

Step #9: Looking for rechecks ..
    <1fc42>  0x01C000-0x01FFFF Chk: 09F0AD13 CalcChk: 09F0AD13 OK (recheck)

*** Found 73 checksums in C:\Users\Owner\Desktop\tuning\maps\maps\Stg2_Nef_Hitachi_Final_O2D_EGTD_CS.20psi.bin

Attempting to output corrected firmware file 'out.bin'
├╛ Opening 'out.bin' file for writing
├╛ Writing to file
├╛ Validating size correct 1048576=1048576
├╛ All OK, closing file

*** DONE! 7/7 error(s) in C:\Users\Owner\Desktop\tuning\maps\maps\Stg2_Nef_Hitachi_Final_O2D_EGTD_CS.20psi.bin corrected in out.bin! ***

C:\Users\Owner>

and did you write out.bin?

try stock and see. Could be your ECU is physically going bad as well

I will pick up another ecu with no immo and try that.   I do have a stock a6 2.7t 6spd ecu I can use in a pinch.

8d0-551m doesn't care about immo. it has no immo code in it.

something else is amiss. Are you sure you are writing out.bin? Why didn't you post the corrected bin?

If possible,  could someone run me7sum on either one of those bins and then I could install it and see if it works.  I guess that would let me know the problem is with my hardware/software.   

Thx again for the help.   Once I can get out bins error free, I'm working on the hex coding.  Luckily for that I have a young friend who helped right the hex for some of the newer GM stuff.