ECU problems

i recently swapped my d16y8 vtec for a d15b vtec (economy mode) in my 2000 honda civic ex. Now with econ mode being on i cant accelerate fast its pointless to have it what can i do to remove the econ mode?

I have heard that swapping the ecu itself will solve the problem. Is that true?

Also is there anything else that needs to be changed because of the swap internaly?

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