i have a 1967 RS. i recently posted somethin about my car dyin and someone told me to get a new coil... i got a new coil and the car died once since but there is something else wrong with it. the rpms go up and down rapidly. i went on the freeway today and the rpms hit 0 but the car stayed on... i dont kno if theres a loose connection or if somethin else is wrong with it... can someone give me an idea, its my daily driver and i need help soon! thank u!!!