Go to queens road, opposite to Jinnah Degree college. There is FAW showroom. They were official Mitsubishi partners and mechanics since ages but not anymore. But they are masters in Mitsubishi vehicles.
Go there, meet with Mr. Meraj (only him) nobody else. Mr. Shabbir is also good but meet with Mr. Meraj. Tell him your story. Tell him that I sent you and you are my brother. Tell him that I have Blue ek wagon and recently i changed throttle body. My name is Junaid. Meraj has my mobile number. Call me when you are there and ask him to talk to me also. I hope he will be able to guide you.