Ok I just reinstall my air pump into my s5. Before the that the engine will idle around 750 to 1500 mark sometime jumping up and down. But after I put the air pump back the car some time will just drop the idle completely and stall the car. Can someone help me where should I look to solve this problem. Thanks

 

is the ACV pipe on and routed correctly?
are the electrical connectors to the ACV connected?

 

And try setting the TPS. Done by adjusting the voltage on the Green/Red TPS wire to 1 volt w/key to on immediately after heating up the engine to as hot as it can get which is achieved after driving the car for at least 20 minutes.

 

Thanks guys. avc are all connected and doesnt look like anything wrong with it but I will take a look at it again. And for the TPS am planning on adjusted over this weekend. Hopefully that will fix my problem