Need to improve the performance.

Might want to give it a major tune-up and also fuel injection cleaning-

How can I find that fuel injectors are fine or not. There is a similar thread which talk about checking fuel injector of Fiat Palio. Does the thing mention here I can perform or there is better way.

The injector spray pattern will be conical in shape if its okay. See this link: http://www.google.com/products/catalog?rlz=1T4GGHP_enGU466GU466&q=injector+cleaning+machine&gs_upl=0l0l0l114697lllllllllll0&um=1&ie=UTF-8&tbm=shop&cid=3788817515394846914&sa=X&ei=_SqNT5rYBc_biAL2jdWHCQ&ved=0CGEQ8wIwBA#