- Joined
- Aug 15, 2007
- Messages
- 1,621
- Vehicle Year
- 1985
- Engine
- 2.3 (4 Cylinder)
- Transmission
- Manual
- My credo
- vertical and above ground
A fact to note is that the ICM provides a ground to the coil. The power to the coil comes from a switched source(ignition switch), and is ON when the key is in RUN.
The power flows through the coil winding, through the ground at the control, ICM or ECM depending, and creates a magnetic field. The ICM or ECM then pulls the rug out from the coil, removing the ground, and the coil field collapses. As it collapses, it(the field) crosses the wires in the secondary winding in the coil, generating high voltage. Spark ensues.
Make sure you have a good ground at the ICM/ECM, but don't bother testing until you have repaired the wires that were damaged. It is possible, but unlikely, that the crossed wires did 'something', but not guaranteed anything is damaged. If the ohm readings are bogus, yeah, get another coil, but before condemning, fix the original problem.
I really don't see how bare, crossed wires would do anything to the coil, but you never know. Make sure all mounting bolts are installed, as I have heard that some designer decided to provide ground at two places rather than internally. YMMV.
tom
added: In case you did not know, the intake side plugs are not used all the time, and fire to help control emissions. If the intake side was disconnected, the engine should run the same, more or less. It should not cause misfire ever.
The power flows through the coil winding, through the ground at the control, ICM or ECM depending, and creates a magnetic field. The ICM or ECM then pulls the rug out from the coil, removing the ground, and the coil field collapses. As it collapses, it(the field) crosses the wires in the secondary winding in the coil, generating high voltage. Spark ensues.
Make sure you have a good ground at the ICM/ECM, but don't bother testing until you have repaired the wires that were damaged. It is possible, but unlikely, that the crossed wires did 'something', but not guaranteed anything is damaged. If the ohm readings are bogus, yeah, get another coil, but before condemning, fix the original problem.
I really don't see how bare, crossed wires would do anything to the coil, but you never know. Make sure all mounting bolts are installed, as I have heard that some designer decided to provide ground at two places rather than internally. YMMV.
tom
added: In case you did not know, the intake side plugs are not used all the time, and fire to help control emissions. If the intake side was disconnected, the engine should run the same, more or less. It should not cause misfire ever.
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