I own a 2006 Ford Focus (petrol) with just over 88000 miles on the clock.
Two years ago the coil pack failed and had to be replaced. One month after that, it was replaced again under warranty as the original replacement failed.
The car is now, once again, exhibiting the same symptoms as before and will be taken to the garage.
I am expecting that this is another coil pack failure, but what I am worried about is that this now seems to be a recurrent failure, leading me to suspect that the failing coil pack might be a sympom of a deeper problem.
What possible problem might lead to repeated coil pack failure?