In relation to my post in the 455 Street section, I measured the resistance across my coil today: lead wires attatched, key off, studs quickly cleaned up w/ some sand paper (dull metal, not shiny). I had to get the multimeter leads in just the right spot to get a reading, (I need to clean the studs more), but the lowest reading I got was 2.4 ohms. This in on my original stock coil. Is this too high and more importantly, can this cause an erradic engine miss?
I believe that is too high if you are running certain aftermarket ignitions like Pertronix, Crane, maybe others.
I would have to measure one but would not find that reading across the primary side of a coil suprising. From an electrical circuit viewpoint the primary side when subjected to a direct current, which is what your ohm meter is doing, looks like an inductor in series with a resistor. Coils are tricky to trouble shoot this way because they may only malfunction when under the load of an alternating current which generates the high voltage on the secondary side and only then overcoming compromised insulation around the windings. I would inspect and compare the plugs first. To test the coil I would substitute another and see if the problem continues.
I think I cured my original problem. Thanks for the input, though. Oh, and once cleaned the coil studs, the reading went down to 1.8 ohms.
