hi, i have a original 1937 ford coupe with flathead, 6 volt, positive ground. car starts right up and runs smooth, but when i turned off, it will not start again. changed coil, condenser and resistor... when its cold, starting good again!!! jumperwire from battery to coil starts good when warm!!!! resistor gives 3,5 volt to coil....... any suggestions????????? Posted using the Full Custom H.A.M.B. App!