hi tuners i have a nissan 2004 wingroad sports model qg15 engine in it wanna put a qg18 enigine in it..the car is E-trottle...some wingroads come wit the qq18 e-trottle..the transmission is 1.5 wanna know if i have to chnage that the 1.8 too... Can the qg15 trittle be interchanged with qg18 are tge...