Ignition coil in Chevrolet Metro plays a great role by using the low voltage from the battery and giving a high voltage needed in firing the air/fuel charge in the cylinders of the engine. This is done through the use of primary and secondary coils of insulated copper wire wound around and iron core which when a current passes through the primary windings creates a magnetic field. When this current is interrupted, voltage of 15KV to 40KV is induced in the secondary winding and then the spark plugs will fire. Chevrolet Metro vehicles have had several ignition coil configurations since 1985 from the conventional distributor kind, the distributor less ignition systems (DIS), and the latest coil on plug (COP) designs. The main difference between these types, therefore, in structure and functioning, for instance, while DIS systems may have many coils in a pack, COP systems fasten a coil to each spark plug. In any case, a bad ignition coil in the Chevrolet Metro will result in a poor performance, engine misfires, and highly-consumptive fuel systems.