I drove the car to my work and it drove just fine. When I tried starting it, it would rev up to 1000rpm, drop to 500 rpm and just die. The second time i tried slamming on the gas after satrting it to make sure it didn't die again but even though my foot was on the gas pedal it still died. I don't know what to do? I tried starting it again, and it wouldn't even start. I am sure it's not the battery, cause i charged it. Any insight would be appreciated.