If yes, one of the reason might be insufficient engine oil pressure. The ECU will not enable the MIVEC solenoid that activates the high cams profile of the MIVEC if not enuff engine oil.
I am running a 4G18 with unichip q and td04L setup. All running fine until I changed to a staged injection setup. Went for retune, car pulled fine till 0.5bar then suddenly car pull back violently and...