Just had a poke about in the engine bay and spotted an extra fuse coming out the fuse box. Red wires goes to a plug inside the fuse box and then onto a little black box stuck to the firewall, behind the ECU, about the size of a relay with a JCW
stamp on it. Also in the plug is a yellow wire that goes off into the ECU plug.
Just interested to know what this box is? Some kind of piggy back Chip?