Got my car rechecked with following findings on idle:
OBD reading: No Problem Found
CO: 0.11% (it was 0.14% earlier. I erroneously mentioned 1.04% sorry)
HC: 145 ppm
Fuel Injectors: No leakage found
Petrol smell: No smell or leakage anywhere
I asked him to check ECU, MAP Sensors and Fuel Return Line. To that he said that everything is okay. If any of those things were faulty, the engine check-light would have turned on and the computer would have found the problem. Even the engine sound would be wierd.
Finally, he said, nothing is wrong. Guess, he was too busy as he had many cars parked outside in que waiting for their turn.
Anyways, took it to another technician and explained the situation. That person just saw one of the spark plugs and found them sooted (a bit black). Do note that the spark plugs were just replaced 6 days before.
To that he said that no doubt your car is drinking fuel and if all the computer reading is off, the problem must be with the Throttle Body and suggested me to either have it changed from Honda, or he can arrange it from Shershah (junk-yard) for Rs.9000... and if I want, he can try cleaning it completely (by taking it off the car) for Rs.1500 but no guarantees.
He also suggested me to mix High Octane and drive, which I just did.
This is the complete situation as of now.
Please suggest what do you all think the problem is and what should my next step be? Should I take my car to Honda or... what???