Been wiring in my new engine. But noticed there are 3 small plugs and a relay on the same loom as the ecu, problem is my old loom had 2 plugs and the relay. one plug fits the other doesn't. what do the plugs do and how can i get around this?
Car is a 1.4 8v mk3 astra, engine loom is from a 2.0 8v mk3 astra.