Can anyone help!!? Ive just fitted a MG ZR160 engine and gearbox to my Rover 25 GTI. It was fitted with the MG wiring loom but will not run on the MGs ECU, it starts but then cuts off virtually straight away? However it will run on the original GTI ECU. Is their a way around this so i can use the MGs ECU or will i have to have the original remapped? Any help would be much appreciated.