Originally Posted By dartphil
I have a 340 in a 72 dart with electronic ignition. Recently i started having an issue with it starting. It cranks fine but won't start until i am letting off the key then fires. I put a new box and ballast resistor on it, still have the problem. Any ideas? Thanks


this is the 'classic' bad ballast symptom. i know you said you replaced the ballast but...

try jumping the ballast by connecting the wires together and see if it starts. you won't damage anything running it for a short period of time.