it was running fine then developed a missfire checked for a spark and o.k, so unpluged the injector and this made no diference to the running of the engine so thought the problem was the injector,had new set fitted and still missfireing also tick over went up to 1500 and wont turn down. a friend then checked for a pulse on the injector and there was nothing so they said its ecu or the loom, so borrowed there ecu and still the same then got a new loom both parts of it had that fitted and still the same,had my old loom checked and it is fine. thanks for the help