Volvo: Throttle body, vacuum leak, rich mixture

Question
Problem is getting worse, I cleaned the IAC, a idle does go 1500 when cold stalls often until warm.

Any idaes?

Thanks
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Followup To

Question -
HI, just cleaned the TB with TB cleaner idle and starting much better now check engine light is on, think it is the o2 sensor.
Is there OBd reader avail is it I or II.

How can it be reset ?
Thanks

Answer -
Martin,
It might be a code that was triggered by the tempoary rich mixture that accured during the cleaning process. Did you plug in the TPS switch on the housing? Depending on what year and model car you have there are different OBD readers.
You will need to read these codes and clear them, drive the car and see if they return.

Answer
Martin,
Did you read any codes? If you did go in that direction and see where the codes lead. A large vacuum leak could also be a problem. Check and see if that could be your problem. Did you adjust the throttle plate when you have the housing off? Is the link rod possibly holding open the throttle? This rod ia adjustable. There is also the possibilty that you have a bad IAC motor and it will need replacement. Go with the visual inspection of the link rod and the throttle plate, then follow the codes.