VW Polo 1.4 unstable idle_EGR Valve_ throttle body clean_throttle body alignment

Hi.
This is what happen with my car. I don't know alot about car mechanic but I tried to save some money .

Do this on your own risk.

Be careful with throttle body, use the tooth brush and throttle cleaner, break cleaner didnt work with me as its dry fast and the dirt still on the part.

Be careful while you reset the ECU. Don't touch the connections together unless they are both not connected to the battery .

Be careful while cleaning the engine side from the throttle, don't let anything go inside the engine from the dirt ( try as much as you can ) for me there was alot of cleaning and I use screwdriver to take of the dirt from the valves.

Buy the obd2 reader to erase the error code it's very cheap . I bought one called u281. And it worked well. Be careful not to turn on the engine while you are using it.