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.

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

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.