Im having a problem with my car its a 2002 Alero sedan with only 54,000 miles on it and I been noticing lately that sometimes the car has a bit of a hard time cranking over when i first start it then starts idles ok at times then kinda sputters a bit sometimes. Today I started the car and suddenly my service light came on and the car just started reving up on its own to 3000 rpms then it shut off on its own. And btw it wasnt just the service engine soon light that came on other lights have come on like the low coolant light and the Trac. control light at times. Its a 6cylinder.... What is going on here??