My 72 Challenger will not start consistently. 1.5 weeks ago it was starting fine (after I loosened and tightened the bolt that attaches the ECM to the firewall). If the car sits for very long at all (in a shop/garage) you have to do that or it will not start. It basically tries to fire after you let off the key which always tells me it is an ecm or bad ground on the ECM. Are there any solutions to this? It used to never do this 20 years ago, but now it is always acting up. I've changed ecms before and the one that is on it is new.
What do you guys recommend or do to keep the old electronic ignition system in good shape?
What do you guys recommend or do to keep the old electronic ignition system in good shape?