im 17 and this is my first car. i dont drive it yet though. i bought it off a guy about 3 or 4 months ago i got it for 1400, its only a 4 cylinder motor till i get more money, its got 59k origonal miles. he said it sat for 5 years. so when i go to start it it starts but it doesnt want to idle. it will seem like it wants to shut off. and if i put the petal to the floor fast it will almost shut off. then i take it off and it will still idle funnny. also if i give it a little gas then let off the rpms will still fall below 10, but if i do let it idle long enough the rpms will be a steady 10. soo.. whats the problem? is it just needing a tuneup?