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Originally Posted by elninoalex
...I disconnected the plug wire and tested for voltage coming in(from the harness end) and got nothing. Should be 12V+ like the other ones I would imagine. So what would cause one cylinder to go down like that? At the other end(where the wires enter the coil), the wires are exposed and probably would be arcing if they had juice. So could they have arced and fried something upstream? Where to look please? Thanks.
Stephen
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The coils have 12V fed to them all the time, like the injectors. The Igniter unit switches a ground to the coil when it is to fire. With the exposed wires, even if the 12V feed and the igniter wire are shorted together, it won't hurt the igniter unit as it will only allow a set current to flow to ground in the igniter, so it won't burn it out.
If you can't find 12V at the coil, then it is a simple supply problem.
Harvey.
