MX-6 L4-1991cc 2.0L DOHC (1993)
Fuel Injector: Description and Operation
Typical Fuel Injector
PURPOSE
Meter precisely measured quantities of fuel into the intake system.
LOCATION
On intake manifold near cylinder head.
OPERATION
Injectors are electrically operated solenoid valves that open when energized. Injectors get battery power from the main relay when the ignition is in
the either the "START" or "RUN" position, and are energized when the Powertrain Control Module (PCME) completes the circuit to ground.
Injection timing and duration are determined by the engine control unit. Injectors are energized either all at the same time once each crankshaft
revolution (during cranking and cold engine operation), or in pairs (normal warm engine operation).
CONSTRUCTION
Injectors are electrically operated solenoid valves constructed of stainless steel and high density plastic to resist corrosion. They consist of a fuel
inlet with filter screen, an electrical solenoid and connector, and a pintle valve and nozzle. Injectors are held in place by the fuel rail and sealed by
an O-ring and insulator.
