misfire in engine

Question

car looses speed runs rough misfires could it be serious engine light flashes then stays on

Answer 1

Misfire condition is very serious, it not only robs the engine of power but deterate  the catalytic convertor. Most misfire condition are ignition related, check the sparkplug wire for its secondary voltage from seeking ground

​ Ignition sparkplug wire should be checked for its secondary voltage from seeking ground, as well as ignition coil internally shorting out