Induction System

Sequential multiport fuel injection (SFI) provides the fuel/air mixture needed for burning in the cylinder.

Six solenoid operated fuel injectors (9F593) mounted in the cylinder heads (6049) meter fuel into the air intake stream in accordance with engine demand.

The six fuel injectors are:

• Positioned so that their tips direct fuel just ahead of the engine intake valves (6507) .
• Connected in parallel with the fuel pressure regulator (9C968).

Fuel:

• Is supplied from the vehicle's fuel tank (9002) by a high-pressure electric fuel pump (9350) mounted in the fuel tank .
• Is filtered and sent to the fuel injection supply manifold (9F792) .

A fuel pressure regulator on the fuel injection supply manifold controls the fuel delivery pressure at a constant 269 kPa (39 psi). Excess fuel supplied by the fuel pump, but not needed by the engine, is returned to the vehicle fuel tank by a fuel return line.

The fuel induction system is mounted on an aluminum intake manifold (9424) which in turn is bolted to aluminum alloy cylinder heads . The intake manifold and cylinder head are cast from aluminum to aid in removing weight from the engine.