Its a 1990 but its not the original ECU.

when it was chipped the original ECU had loads of green stuff on it which meant it was hard/impossible to solder the superchip on so they replaced it for a different one (earlier one?).

i also spotted another wire which was not connected to anything which had a similar connector on the end.....

its just where the arrow is pointing just outside of the picture



the car is running perfectly fine bu ti would still like to know what its for...