mekantor

I'm fairly certain I have a failing one. Typically the tests are to check resistance between certain pins and to make sure it is in a range, but I havent found specific info yet.

If nothing comes up, I will probably just try a permutation of all pin combinations and on every ignition coil until I find some readings that stick out.

reitmeid

You'll need a VOM (volt ohm meter) to measure the resistance of the primary and HT windings. You'll need the factory specs to compare your readings. The primary is very low, usually 1-5 ohms. The secondary HT is usually 7 to 15 kohms. It varies so you'll need the factory specs. Sometimes they fail only intermittantly or under load, so the easy tests are not conclusive. If you can solder you could put together a simple circuit with a 12v source, a 555 timer chip, several resistors and caps, a pot, and a power transistor to test them dynamically. I put together a similar circuit that put out bright blue/white 3 inch arcs. I could adjust the intensity and frequency with the pots and really make the arc scream. Eventually I upped the voltage through the primary of a GM hei coil to 48 volts and beefed up the output transisors to increase the current and I could draw out 5 inch torrents of flame. Or just buy a new coil if you suspect one.

mekantor

Thanks for the info, I can solder so maybe I'll give it a shot if the simple resistance test isnt conclusive.

I havent been able to find the factory specs, I hoped someone reading this might have them. I'll buy a new coil once I identify the specific one, which will get a lot easier if it keeps getting worse, since I'll be able to just disconnect each one until there is no change in the miss.

reitmeid

I just got this from the internet. It's the most basic type circuit.