HELP... S2 knock sensor
Hi all, finally putting my engine back together to start it up when i found i have a green plug on my wiring loom and no where for it to go. Its a 86 S2 however its had a new engine. This engine does not have a knock sensor on the manifold however the loom has the plug for it. (And its a 2 piece S2 manifold) Ive been reading and i believe i need to change my ECU to allow the car to run wihout a knock sensor? Only problem is my ECU has no stickers on it so im not sure which one i have. How do you identify which one it is without stickers? And finally i have a white round plug on my loom with nowhere for it to go. Does anyone no what this is for?
Thanks
Graham