The car has done 45,000 kms and I have already got the Sparkplugs checked and cleaned. And yes, when the engine stalls I do get the tapped sound.
I did consult three different mechanics, one offered to completely open up the throttle and clean up everything including different sensors. I am not sure if that should be done for an EFI car. Any suggestion on it?
Regarding fuel filter I have been told that it is integrated with the fuel pump in the main tank and cannot be cleaned, complete pump needs to be replaced.
Last suggestion was to have the car tuned up through computerized scanner and not to open up anything at all. Where can I get the car checked through a computer in Islamabad, need a reliable workshop.