I don't know if the same could apply to a Peugeot but I have read about aftermarket coil packs causing pinking on quite a few Ford Focus. Evidently some of the crap coils have poor or incorrect number of primary/secondary windings resulting in poor inductance or poor coil saturation or something. Genuine coil packs were the cure.

Has this had a coil pack fitted lately and what quality is it?


Graham