You need to be very careful dabbling with ECU's. It will be very easy to make things worse. Like tampering with twin SU's without experience.
You need a man with a plan and a rolling road to get the best outcome.
Indeed. The SOP is to start by reading the current configuration of the ECU and writing it to a chipfile, saving it somewhere safe so that if the new map makes things worse you can restore the original. I've got about 4 copies of my map stored on various computers and flash drives.
Adrian is also quite right - remapping an ECU also depends on the ECU itself not being locked down.
Alternatives are to entirely replace the ECU (which is what they did with my conversion), or to add a 'piggy-back' device which can take over some of the functionality. This is usually used in cases there the main ECU does loads of additional functions in the car which need to be kept, or where there is little appetite to do extensive modifications to the wiring loom.
