Hi thank you for your response , when we replaced the IAC twice and we reset the ecu ,of which it clears this but it still comes up with P1504 fault
after a few miles driving.
Are you saying the throttle position sensor what is attached to the throttle body is causing the fault.??

Reference to the cold start /auto choke it will not idle from cold when first started,i cant find and get the choke to kick in at all we have changed numerous items on the engine even check for air leaks also.the parts changed was cambelt,plugs,coil pack,leads, filter,and we have
taken the battery off for a full night and even the fuse for the ecu to try to re-set this.
When the car warms up it starts and idles fine, apart from
odd stalling when aproaching juctions now and again.