Coil packs failing.

My sons MGf 1.8vvc coil pack failed so we replaced it with one I had in the garage, all was well for a few weeks but then that failed so I bought one from the sponsor and now after about 3 weeks that too has failed.



The car is juddering under acceleration which it did for the previous failures, is there anything that could be causing the coil packs to fail anything else that could be blowing them?

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