Hi Imran,
Why dont you try taking it over to Honda Drive In, get tuning and throttle body done.
Throttle body will cost you around 3000/-, secondly I'll advise for a temporary time being to fill up your tank till F, go for shorter amounts max 1500 per tank.
Go easy over pedal, then after a month take the reading again and see if there's any effect.
A few months ago my city was giving an average of 7 only, I tried the same and now it gives 11.5 and with AC 10.9