Occasionally when i try to start my car it wont start. It acts like its out of gas even with a full tank. When i turn my key on i can hear the fuel pump working so i dont beleive thats the problem. My fuel filter and air filters are new and in good condition. I have already elimatated plugs and plugwires. Eventhough its fuel injected when im trying to start it (while its being weird) sometimes if i hold the gas peddal just right i can get it to start, but that doesnt always work. Ive been told one of my oxegen sensors could be to blame, but i would like to know more.