Vehicle has come in with high idle new iac unit fitted and new ecu and is still running high / hunting .. smoke tested for air leaks all ok has anyone had trouble on high idle on this vehicle, theres nothing on autodata  iac valve is a four wire and is wide open, fault code P0511 idle air control circuit.  checked resistance between teminals 1 and 2 / 3 and 4 both 46 ohms checked also resistance on new unit to see if correct (same) at the wire end iac disconnected there is at this moment  12v supply to  pins  1 and 2 and earths at 3 and 4.  throttle postion sensor is 9.4 volts check with meter i know the early engines should rear lower .7 or so, is this the same with this one. also unless i am going mad theres no air mass sensor does anyone know how these valves work there seems to be no voltage movement on the wires what could be stopping this valve from working

hope this explanation sound right thanks phill

Is it erratic when driving and revs hanging when slowing or changing gear?

I think you should still be looking for 0.7 volts at idle, but could be wrong. You should be able to see the voltage in live data.

I could give up Stella, but I'm no quitter.  

These use a MAP sensor; so there's no MAF like the Fiesta.

.

yes .94 on the tps symptoms as you described this tps is not adjustable no room to elongate make the holes bigger either my snapon scanner say this is the desired voltage but i hav no written information does anyone know for sure

  thanks phill

ill be back in a minit just going to reasemble all and move tps sensor

 regards phill

thanks phill

On an A9B the TPS voltage at idle should be 0.7 to 1.1. 

More importantly, the ECU should be showing the throttle status as "Idle" and not "Part Load."

.

sorry im going to have to continue this in the morning my wife calling ill list live data in the morning if thats ok and maybe you can see if somthing that looks obscure

Thanks for all of your help    phill