correct spark,, personally do it yourself afterwards as you goto fidle about with the throttle settings if you got a ep82 to make it work. glanzas will work as they have a variable TPS, and the GT's dont either on/off. This is why you mess about with the throttle settings to make think the throttle is on al the time but theres a side to where the EMU notices this as does the "clean spark plugs check" and which case the engine dont start. Mine is perfectly fine, works all the time and thats in my gt. hows it hated on everyday car ? it only works when you put your foot right down when idling if you set your vs pulse low like "2". regarding which RPM you set it to. mines to 3500rpm and i dont notice i got it untill i do plant it at lights.standstill and loads of loud pops/bangs when coming off it