Fuel Injection Timing

Injection Timing:

OPERATION
Two types of fuel injection timing systems are used - simultaneous multiport fuel injection system and sequential multi port fuel injection system. In the former, fuel is injected into all eight cylinders simultaneously twice each engine cycle. In other words, pulse signals of the same width are simultaneously transmitted from the ECCS Control Module to the eight injectors two times for each engine cycle.
In the sequential multi port fuel injection system, fuel is injected into each cylinder during each engine cycle according to the firing order.
When engine being started and/or if the fail-safe system (CPU, camshaft position sensor) is operating, simultaneous multiport fuel injection system is used. When the engine is running sequential multiport fuel injection system is used.

FUEL SHUT-OFF
Fuel to each cylinder is cut off during deceleration or excessively high speed operation.