Injector Malfunctioning

When the ECU senses that engine speed is less than a predetermined amount in the alternating injection mode (except during acceleration) and that injection pulse angle (crank angle) is less than a preset amount and at least one injector does not inject fuel 4 times in a row due to electrical problems, it determines there is an injector failure. If only one injector fails, the ECU will permit the vehicle to start and drive, but only to a predetermined maximum RPM. When the engine reaches this maximum RPM it will not go faster, indicating the fail-safe system is in effect and telling the driver mechanical attention is needed.