Well this problem is just starting okay If I turn on my vette it turns on normaly.Once I get on the streets or if I let it idle for too long it starts to idle roughly jumping from 500 rpms to almost 100rpms and then it turns off.So if anyone can give me advice at to what this problem can be.I already checked if my fuel pump turns off,it doesnt it stays on even if the car shuts off.Checked all the wires,spark plugs, and coil packs and still the problem remains im getting really fustrated with this car I dont use it often so I dont know why it always gives me problems

makes me think twice about buying this vehicle but every car give you problems...but never heard as much as this one.