Acts like it isn't geting gas on 2004 Nissan Murano

There are times when I am driving and my car acts like it isn't getting gas. i can push the gas pedal all the way down and nothing. then do it again and it takes off. also, when driving is acts hesitant.

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1 answer 1 comment
have the fuel pressure checked. have the cat converter back pressure cheked.

Roy
Sometimes the engine light comes on but then goes back out after i add fuel injector cleaner. Will the cat converter cause this type of problem? Is there a front and rear catalytic converter? if so, which one need to be replaced - rear? Thanks so much for the help.