67 Coronet Conv
Well-Known Member
Thinking I have some sort of ignition issue with my 67 coronet.
Went for a drive yesterday evening and about after 10 minutes the car died while coming to a stop. Cranked it and it came back to life and drove another 300 yards and it died and wouldn’t start again. After 5 min cranked it and it started for 1 sec and died and would crank but not start. When trying to crank it seemed like the battery was dying but after another 10 minutes would crank fine. Thinking I got some ignition issues, got towed home and check few things today on the ballast resistor and coil and spark. Car started up just fine today...thinking It’s something with the upgraded ignition.
Ballast resistor was reading between 1.5 thru 2.1 ohms, voltage was 9.6 and 4.43 on each side.
Coil (MSD high vibration coil-only coil that can be mounted horizontal per msd) voltage was 4.28 on the + and 1.26 on the negative.
Looks like I have a weak spark, It’s orange color, see photo
Any ideas? Thinking of just upgrading to msd ignition system.
Cars specs
440 30 over
Edgelbrock RPM performer heads
Holley 870 street avenger
Mopar intake
Mopar cam 312 .590” (?)
Harland sharp roller rockers
10.5 Pistons (what the guy told me)
727 trans
3.23 rear end
Went for a drive yesterday evening and about after 10 minutes the car died while coming to a stop. Cranked it and it came back to life and drove another 300 yards and it died and wouldn’t start again. After 5 min cranked it and it started for 1 sec and died and would crank but not start. When trying to crank it seemed like the battery was dying but after another 10 minutes would crank fine. Thinking I got some ignition issues, got towed home and check few things today on the ballast resistor and coil and spark. Car started up just fine today...thinking It’s something with the upgraded ignition.
Ballast resistor was reading between 1.5 thru 2.1 ohms, voltage was 9.6 and 4.43 on each side.
Coil (MSD high vibration coil-only coil that can be mounted horizontal per msd) voltage was 4.28 on the + and 1.26 on the negative.
Looks like I have a weak spark, It’s orange color, see photo
Any ideas? Thinking of just upgrading to msd ignition system.
Cars specs
440 30 over
Edgelbrock RPM performer heads
Holley 870 street avenger
Mopar intake
Mopar cam 312 .590” (?)
Harland sharp roller rockers
10.5 Pistons (what the guy told me)
727 trans
3.23 rear end
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