i have c180 and the car was peviously not goingover 4000rpm or it was cutting out, but then last week i went to start it and it was just turning over but not starting, but a cuple days later i tried it and it drove fine again, then the next day i went out and tried to strart and was not starting again, i thouhgt it was fuel pump but im not suring with it starting again after doing it the first time. can any one help??