I have a 2006 trail blazer and it is misfiring. It does it some time not all the time I was thanking water in gas can someone help me it only has 45000 miles on it

This link may help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-11.html#post2028083