hi, ive changed my grey injectors for yellows, im going to be fitting a fmic next, i have a induction kit, full decat, upgraded headers, changed all hoses for samco, all gaskets have been done, i have a z4 chipped ecu, will this support what i have done, if not whats my next move, esl?

 

nope it wont m8. you can either fit an esl board as you said or go aftermarket like apexi and commander or similar mappable ecu. you can fit the esl motherboard to the z4 tho as there is a spare bay for it im sure.