Hi this car every now and then the check engine light flashes and sometimes it goes to 3 cylinders sometimes it flashes for a few seconds but it's fine. Errors are always on the 4 cylinder blow loss. I report the fault codes po304 po300. Replaced spark plugs coil reversed 3 and 4 injector checked intake manifold. Maybe for 40 km it's fine then one of those 2 things happens. Checked ECU connection wiring to see status.

Engine 169A4000.

FIAT - 500 V (312) - 2007 - Fp043gt