cool my disco has no edc (that i'm aware of) it had a throttle cable'd injection pump on already (the one with the 3 wires outta the top) fitted new engine yesterday an going to go connect up pipes, wires an other bits shortly,i'd been toild already by a geezer the sensor in the head was for the EGR so was not needed just wanted clarification from guys in the know...... ty ...... my last engine threw a rod on pot 4 went with a reet bang