Alan Stripped the throttle assemble again checked the motor was working put it all ack together then discovered that a small rubber plug was missing from a valve ontop of the rocker cover - problem soved - many thanks.
Alan Thanks It occurs all the time now - ive cleaned the throttle assembly including removing the motor cleaning and reinstating. After the initial start up it now revs at 1400. I have a chrysler voyager 2005 2.4 petrol engine.