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Hi,
You are not going to find this possible over a generic-OBDII interface, and need to be exceptionally careful when making changes to the ECU.
You need a pass-through type system, details of which are elsewhere within these forums.
There is a lot of software around on eBay, etc. which is useless - I would recommend going to specialist if you are looking for a remap.
Good Luck,
Gareth
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