Guys my car issue has been solved by the grace of Allah. I would like to share my complete experience, so that, It may be helpful to anyone in future.
Actually starts from when I took my car for regular checkup to one on Suzuki Worker (Saqib, Mudassir, Mohsin working near Gareeb abad). They changed suzuki ultimate oil (i usually purchase it from IG), spark plugs, shims setting, and wash engine room through Kerosene Oil. When I reached home this problem started.
I again go to same person, he placed his suzuki scanner and found the issue of Cam Shaft Sensor and changed the same. but issue was not resolved. Next day, he changed Crank Shaft Sensor. At the end he advised me to use thick engine oil, because as per his knowledge my engine has been gone. I denied!
Next day, I went to IG motors for complete general checkup, they said, vehicle has issues of Ignition Coils, Camshaft Senor, Air In take Sensor. But they do not have sensors in their stocks and cost worth for Rs. 17,000/- around for each sensor.
Then, I visited to Jamshed Road (Kit Zone), he referred a person at Bahadurabad Danish (Near Saleem Bhai, opposite Medicam Round about). Danish claimed himself a awesome electrician, he gave me appointment after 3 days. Within 10mins he switch my car on direct petrol. issue has been resolved. He said, this is issue of ECU card, and charged me Rs. 1,500/- but he did not find ECU card for me.
Then, I called to Energy Zone through a reference of OLX guy (he was selling ECU card, but same was sold). Owner of Energy Zone Mr. Jamil is a nice person, he referred me to Landirenzo Frenchise Mr. Rehan near NMC DHA. I visited to his shop, he spent three days on car, he had changed many CNG things, even ECU card, Crank Sensor but issue was not solved, he just charged Rs. 500/-, and referred me to visit Naseer Autos (SITE).
Then, I visited to Naseer Autos, they spend first full day of 7 hours, but they did not find the issue, after Eid, they found the issue of wrong SPARK PLUGS (not matched with recommended number or specifications). They changed spark plugs and Ignition Coils, as old spark plugs became the reason of damaging ignition coils.
Now, my car is Okay, I learned the lesson that, for the purpose of engine, we should only visit to Suzuki Dealership only, and for other purpose, we can rely to any mechanic.