I turned off my car at the gas station last night and then I tried to start it and nothing. She will crank over but will not start. Checked the fuel pump and it is turning on. I took a spark plug out and grounded it to the motor and I can not see a spark. I have heard of the coils going bad. Is there a good way to check them??? If so how. Also could it be the crank shaft sensor??? Please help. I do not want to take it to the dealer. Any ideas would be great. Thanks