Ignition woes

the car is a 70 dart with a 440 and electronic ignition. Its ran fine until when i went to start it, it didnt fire until i let off the key. its very tricky to start like that. So i put in a new ignition switch and is still the same. i have changed the coil and still the same. What about the starter relay switch? Will that cause the car to fire when letting off the key.
Author: admin