Ok my car has been acting weird the last few days. This moring i go and start my car and leave for school no problem. After school i got to a doctors appointment. After 30 mins i get out and i start my car up (the motor is still hot) and the rpms are all over from like 1100 down to 600 like it wants to die or something??!!! I reved it up to 2,000 rpm twice and it idled fine. The car drives fine and has alot of power but this is the second time it has happened and its getting annoying. It only happens if the engine is hot or warm and only at start up??? Any ideas?? I think i need to replace the fuel filter too b/c its been in there a year now but i dont think that is it. Please help and thanks alot.