Hi again.When I had my small turbo chipped the amal valve clicked like mad so I took it to a garage and he disconnected it.There is a screw in sensor in the intercooler on the cold side and if you disconnect it your car will not rev over 3k I think it just cuts the boost out.I got a new one for £15.Hopes this helps.Im not sure if you mean your car doesnt idle correctly or if you meant when your traveling at speed so what ive said might be of no use.