Epic ignition coil failure

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No.

Because when the ECU (at least, on six of my cars) detects the misfire, it no longer pulses the injector for that cylinder.

The car will run poorly, but it won’t damage the cat, or engine, because there will not be any unburned fuel to wash down the cylinder walls or load up the cat.

I wouldn't count on that. When that CEL is blinking like a christmas tree, you'd best pull over and call a tow truck.
 

Astro14

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I wouldn't count on that. When that CEL is blinking like a christmas tree, you'd best pull over and call a tow truck.
I appreciate your concern, but I do understand how my cars work. I have had a coil failure on two of the Volvos and on the S600. When a misfire happens, it is exactly as I describe.

The car is taken to my shop, hooked up to VIDA or XENTRY, diagnosed, and fixed. Not the end of the world.

I even keep a spare coil (Bosch) for the Volvos, a $70 part. The coils on the S600 are unique (left/right) and fire 12 plugs each. They list for $1,450 so, I don’t keep spares on hand, but my local dealer can get them in two days, at a discount.
 

ls1mike

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All the cars and miles I have put on them the only coils I have ever had fail are on my riding mowers.
Probably just jinxed myself.
 
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I appreciate your concern, but I do understand how my cars work. I have had a coil failure on two of the Volvos and on the S600. When a misfire happens, it is exactly as I describe.

Yes, but not all cars work that way, that was my point. And if the fuel injector is actually shut off preventing a "misfire that could result in catalyst damage", the CEL should not be blinking.
 
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All the cars and miles I have put on them the only coils I have ever had fail are on my riding mowers.
Probably just jinxed myself.
My 996 had them hanging out the back right in the road spray.

I had one fail, 4 were close behind with housing cracks, and the 6th was new-ish. 160k miles though.

#1 in my BMW failed, pretty normal since it's right in the heat. Was about 100k on that one. Just changed the one.
 

xgmad

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it was epic because the car started jerking back and fourth, for some reason the coil did turn on and then turn off. On the road i seriously thought the catalytic converter clogged from running hdeo 15w40 🤣
 
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it was epic because the car started jerking back and fourth, for some reason the coil did turn on and then turn off. On the road i seriously thought the catalytic converter clogged from running hdeo 15w40 🤣

Was there a Check Engine Light before this happened?
 
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it was epic because the car started jerking back and fourth, for some reason the coil did turn on and then turn off. On the road i seriously thought the catalytic converter clogged from running hdeo 15w40 🤣
At least it didn't start jerking back and fifth. That would have been worse.
 
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