Miss fire

My monte carlo, has been miss firing , first i took it to the dealer and that was a mistake after waisting 65 buck i went to the local auto zone and they told me that it was my fuel injector , so after replacing it it ran fine for two weeks and today the problem came back, so i was wondering in stead of replace the other 5 fuel injectors at 80 buck a pop if their was something i could soak them in something that would clean them to working condition.

thanks for the help

Try getting and injector flush or a motorvac (preferably). It will try to clean your injectors, fuel rail and valves. It is a good service and amazingly helps a lot. Good Luck.