General information. Torque wrench settings Nm lbf ft

VVT-i engines

Non VVT-i engines

Torque wrench settings Nm lbf ft

Idle speed

Automatic transmission.............................................................................	700 rpm
Manual transmission..................................................................................	650 rpm

4A•2 Fuel and exhaust systems

Crankshaft position sensor (1.3 litre) Exhaust manifold bolts/nuts:

1.3 litre engines

1.6 litre engines Fuel pipe fittings

Fuel pressure regulator bolts Fuel rail mounting bolts Intake manifold bolt/nuts

Throttle body mounting boiis/nuts:

1.3 litre engine

1.6 litre engine

Camshaft oil control valve

Camshaft position sensor

Crankshaft position sensor

Exhaust manifold

Fuel rail mounting bolts

Intake manifold

Throttle body.

The fuel system consists of a fuel tank, an electric fuel pump (located in the fuel tank), an EFI/fuel pump relay, fuel injectors, a fuel pressure regulator, an air cleaner assembly and a throttle body unit. All models covered by this manual are equipped with the Multi

Point Fuel Injection (MPFI) system.

Multi Point Fuel Injection

Multi Point Fuel Injection (MPFI) uses timed impulses to sequentially inject the fuel directly into the intake port of each cylinder.

The injectors are controlled by the Electronic

Control Module (ECM). The ECM monitors various engine parameters and delivers the exact amount of fuel, in the correct sequence, into the intake ports. The throttle body serves only to control the amount of air passing into the system. Because each cylinder is equipped with an injector mounted immediately adjacent to the intake valve, much better control of the fuel/air mixture ratio is possible.

On VVT-i engines, the engine management ECM also varies the timing of the intake camshaft. The camshaft timing is varied according to engine speed and load. Retarding the timing (opening the valves later) at low and high engine speeds, improves low speed driveability and maximum power respectively, whilst advancing the timing at medium engine speeds increases mid-range torque and reduces exhaust emissions.

Дата добавления: 2014-12-23