P Dubya
Well-Known Member
Well.... It looks like I have a very common problem from doing a bit of reading in past posts. Here is what I can tell you has happened and what I have done...Car is a 1969 Road runner, 440/6 pack. It has been updated to electronic ignition before I purchased it but I do not know what the under cap components are... Best guess is Mopar but could also be aftermarket Pertronix, etc... I think I have been lucky so far as the crank/no start issue has only happened at home. I think we can rule out any kind of heat induced electrical gremlins as the car is always in a 72 degree garage. When this issue started a few days ago I started the engine and no more than backed out of the garage and it shut off as if I had turned the key off. No spark at plugs. I tested ballast resistor for continuity between blades (there are 4 of them) and there seems to be good continuity. I did not know what value to use for resistance so did not try. I found one spade terminal that may have been a bit loose so did a little work on that... Still no start. Used a jumper wire directly from battery to + terminal of coil. No start... Pulled harness off of ICU, no corrosion or anything out of the norm visible there. Still no start... Walked away from it for a while and came back to do some more testing. This time I had spark at the plugs so I started it up...It idled happily in the driveway for at least a 1/2 hour before I headed to town for a drive, gassed it up for the weekend and put it away for the rest of the day. Evening came around and the wife and I headed out... Guess what, it didn't start! It has been a long weekend so I have tried to read up as much as I can on the ignition system. Can anyone suggest any other tests I can do before I look into purchasing parts, first and foremost a new ICU Mopar part # P4120505 and possibly a new ballast resistor? Thanks!!