Hi I wondered if anybody has any suggestions regarding the above fault p0505 (idle control voltage high) have had this problem for a while .I have changed the throttle bodies twice and had the values adapted to the ecu but the fault still remained, next course of action was to have the ecu sent away for test was told fault on 5volt side authorised repair .On refitting the ecu I decided to put a code reader on before starting the engine so that all was lit was the dash lights the ecu still had p0505 fault still present which I found odd after the ecu was supposed to have been fixed and tested and also I would have thoght the engine had to be running to trigger the code.I reset the light and tried starting the car and it ran ok for about 5 minutes and then put the light on.Are these simtec 70 ecu worth repairing or would it be best to replace it with a new one . Any thoghts and replies regarding this fault are very much appreciated has I am lost with where to go next.The car has also been in the dealers who are not sure but think it could be the ecu.

Thanks Nigel