MINI Cooper Ignition Coil Packs
The Ignition system in the MINI impacts both the economy and performance of the engine. As an electrical device it might be assumed that it either works or doesn't work. But that is not the case, in reality a coil can loose it punch and simply decrease the spark energy it puts into the combustion chamber.
Intermittent starting problems and even a engine misfire can often be traced to a corrosion build up on the connections to the coil.