Problem:
I have a problem with pcmtuner flash. I can read but can’t write EDC17c84 via OBD.
Solution:
Remove ecu and read/write again on bench module 71.
If car not start by module 71 bench mode, the problem can be the checksum.
After fixing checksums, it works on bench module 71.
If not working, try unplug T° engine sensor and try if not succes Wait until T°10 and retry.