Exhaust system

All engines

The fuel pump will operate as long as the engine is cranking or running and the ECM is receiving ignition reference pulses from the electronic ignition system (see Chapter 5B). If there are no reference pulses, the fuel pump will shut off after 2 or 3 seconds.

The exhaust system includes a manifold fitted with an exhaust oxygen sensor, a catalytic converter, an exhaust pipe, and a silencer. On models with VVT-i engines, an additional oxygen sensor is fitted after the catalytic converter to further fine tune the engine and monitor the performance of the converter.

The catalytic converter is an emission control device added to the exhaust system to reduce pollutants. A single-bed converter is used in combination with a three-way

(reduction) catalyst. Refer to Chapter 4B for more information regarding the catalytic converter.

Warning: Petrol is extremely flammable, so take extra precautions when you work on any part of the fuel system. Don't smoke

or allow open flames or bare light bulbs near the work area, and don't work in a garage where a natural gas-type appliance (such as a water heater or a clothes dryer) with a pilot light is present. Since petrol is carcinogenic, wear latex gloves when there's a possibility of being exposed to fuel, and, if you spill any fuel on your skin, rinse it off immediately with soap and water. Mop-up any spills immediately and do not store fuel-soaked rags where they could ignite. The fuel system is under constant pressure, so, if any fuel pipes are to be disconnected, the fuel pressure in the system must be relieved first. When you perform any kind of work on the fuel system, wear safety glasses and have a Class B type fire extinguisher on hand.

Дата добавления: 2014-12-23