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 to all sifus!have anyone tried to diy ignition coil booster?such example product like superspark, hks twin power. as i noe the ingredient is quite cheap less than 20bucks but sell at 1++ and inside is just 3 or...