[Yoni_d]

Hi Guys

When I start my A/C the engine tends to overheat when the car is idling. Usually the car drives fine and there are no overheating problems.
The electric fan works when the A/C is on.
The auxiliary air valve is not the original one - see attached pictures but I guess that it is not important since it only opens an air way - and it does that.
The engine idle drops a little when the A/C is on (from 900 to 800 ~850)

The question is what can be wrong?
I assume that when the A/C is on the fuel mixture gets very lean and thats what causing the phenomenon..
Do you have any ideas?

Thanks!