i heard from somewhere that when u install fuel management/piggyback to a VVT-i/DVVT engine, we must first diable them... if not, it will be quite hard to tune the fuel....
is that true?? i highly doubt dat la...but...
hi all member here, i need some suggestion for u'll cos i need to upgrade my step to more bhp so what sould i need to do... now i got some choose like changing to a biger turbo; put in 272 cam; or haltech? so which 1...