Join Date: Mar 2002
Location: Austin, TX, USA
Re: No Spark
Your measurements may be normal and I don't think they necessarily mean the coil is bad. When the ignition system fires the coil, it'll briefly ground one terminal and then release the ground to fire the spark. Sitting still the ignition controller won't be pulsing and you'll get the readings you found. Essentially those readings indicate that 12volts is being supplied and that it is flowing through the coil primary, but the primary coil isn't being grounded to cause current to flow - most likely normal for sitting still.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI