Do the coils get hot

[rushes]

I mistook Mr. ****'s Dik's 220 words over the course of 2 paragraphs of questions as real interest in the subject because it covered several ignition systems, with history, stated he had done some background reading, and listed actual testing situations. I missed the fact that all he wanted was a Y or a N without superfluous details.
I offered up information so that Dik could draw his own conclusions or see areas to research further. In the future when I choose to reply to questions I will always remember this thread. I understand the difference between how the clock works and simply stating the time. If someone wants a simple answer, ask a simple question or face the clock works.

ionbeam,

I want to tell you how lucky this forum is to have a guy like you. You are always right there with a quick response.

And I really enjoy reading your posts. Always educational for me. :good:

Thanks for being here! :clapping:

 

[mcatrophy]

Ionbeam -

Just a point (to add to the boredom of the average reader):

QUOTE (ionbeam @ Jul 19 2008, 02:12 AM) <{POST_SNAPBACK}>

... The system designers may anticipate that the spark plugs are always plugged in when the ignition system is running so they design one way. The ignition system for most motorcycles actually fires two spark plugs with one coil so the designing engineers use a different ignition system that typically is tolerant of a plug wire being open because there should be at least one spark plug completing the high voltage circuit...

On the contary, the plugs are in series with the coil secondary, there is NO tolerance of disconnected plug lead. (Circuit from my Trophy, take no notice of the "igniter" bit.)



(Click on the picture for a larger view)

Having one plug lead disconnected means there is nowhere for the current to go, it will arc across to the chassis somehow, breaking down whatever insulation is necessary.

Wouldn't want peops to leave their plug leads floating around, and possibly blow up a coil or worse!

Other than that, quite a good explanation.

 

[Constant Mesh]

There may not be any current flow in the coils until the engine cranks. The ECU may keep them open-circuited until the starter is actuated.

 

[Zorlac]

There may not be any current flow in the coils until the engine cranks. The ECU may keep them open-circuited until the starter is actuated.

I believe that unless this is spinning,

the power FET's in the ECU won't be pulling the coils to ground, hence no heat.