Cars Q&A

I wish to know how to tune the engine of Ford Ikon 1.3 CLXi (2002) for optimum performance and milage. The problem I am facing is that whenever I stop at a traffic signal and begin to move again, the car's accelerator doesnot respond. I need to just touch the accelerator for few seconds and then it starts to respond yet again. Otherwise my car is giving me good service and I am owning it for the last 2 and 1/2 YEARS AND ITS GOING GREAT. It gives me about 12 kms in city and about 14-15 on the highway.