Ecu mappin problem.

[Cooldrft]

Pot, kettle, black??????

Id say they wired it direct to an ignition switch
If the power to ECCS and coils are taken from the Ignition the pfc wont have time to save your changes, so it will be stuck in a read only mode and won't store your changes or "commit......."

Replacing the relay isnt even half the battle. Gtrs have 3? 12v+ supply/back up sources pin no 43, 45 and 58?
your alarm removal could have messed up a supply, check the pins above first, had it happen on an s14a before simple enough fix

Where's it based?

Same thing happened my r32.
1 power wire was not going through a relay ,so wasn't giving the delay necessary to save changes.

When you turn the key off ,you should hear the relay click after a second or 2.

[fitzygtr]

Thanks lads - i am heading up to the lad thats mapping it tomorrow and will try what ye have suggested and let ye know how I get on.