JuizeeeBrain said:then how to prevent knocking?
this i'm not so sure la ...but can try this ..
1) use a cold plug ...like 6 degree up ...for street use 6 degree is enough...cos cold plug got disadvantage too.
2) don simply adjust the idle timing too early or too late ....
this all i know la ..if the engine using electronic coil 1 ...i think the control unit hv set all the thing inside ...will less to happend kua ...n the car using electronic coil 1 can not simply change to other spark plug 1 ...pls ask b4 change hehehe :shades_smile: