When I'm in 3rd or higher and just cruisin and then really hit the gas the car seems to hesitate before going. What would be causin this? Its stock with a cai. Thanks for the help.

 

when was the last time you have a tune up done on your car ?

 

My first car was an old '89 mazda. It had some considerable hesitation. I bought some of that injector cleaner crap and it made a very noticable difference. Ive heard that sometimes injector cleaner can damage stuff? - so ask someone about that first.