Ford Focus>> Ignition system>> General information>> Two sparks of ignition at the same time
In a design there are two coils of the ignition one of which operates candles of the 1st and 4th cylinders, and another – the 2nd and the 3rd. Each of coils submits a spark at the same time on both cylinders. So in the 1st and 4th cylinders the spark slips at the same time, but the working mix ignites only in that cylinder in which the piston is in VMT at the end of a compression step. An operating procedure of cylinders on the Focus 1 — 3 engine — 4 — 2.