Fuel Delivery and Air Induction: Service Precautions

WARNING: Adhere to the following procedures any time the fuel system is being worked on in order to reduce the risk of fire and personal injury:

- Keep a dry chemical (Class B) fire extinguisher near the work area.
- Place a "CAUTION FLAMMABLE" sign in the work area.
- Work in a well-ventilated area. Do not smoke, and keep sparks and open flames away.
- Wear eye protection.
- Use caution when working near the catalytic converter to prevent the possibility of burns or fire. (The temperatures within the converter can exceed 537 degrees C (1000 degrees F).)
- Relieve the fuel system pressure prior to disconnecting fuel system components.
- Disconnect the negative battery cable except for tests where battery voltage is required.
- Use a suitable container to store or catch fuel.
- Do not replace fuel pipe with fuel hose.
- Plug all disconnected fuel line fittings and hoses.
- After making any fuel system repairs ALWAYS inspect for fuel leaks.

Precautions on Fuel System Service

WARNING: Before attempting service of any type on fuel system, the following should be always observed in order to reduce the risk or fire and personal injury.
- Disconnect negative (-) cable at battery.
- Do not smoke, and place no smoking signs near work area.
- Be sure to have CO2 fire extinguisher handy.
- Be sure to perform work in a well-ventilated area and away from any open flames (such as gas hot heater).
- Wear safety glasses.
- To relieve fuel vapor pressure in fuel tank, remove fuel filler cap from fuel filler neck and then reinstall it.
- As fuel feed line is still under high fuel pressure even after stopping engine, loosening or disconnecting fuel feed line directly may cause dangerous spout of fuel. Before loosening or disconnecting fuel feed line, make sure to relieve fuel pressure referring to Fuel Pressure Relief Procedure.
- A small amount of fuel may be released when the fuel line is disconnected. In order to reduce the risk of personal injury, cover a shop cloth to the fitting to be disconnected. Be sure to put that cloth in an approved container after disconnecting.
- Never run engine with fuel pump relay disconnected when engine and exhaust system are hot.
- Note that fuel hose connection varies with each type of pipe. Be sure to connect and clamp each hose correctly referring to Fuel Hose Disconnecting and Reconnecting.
After connecting, make sure that it has no twist or kink.
- When installing injector or fuel feed pipe, lubricate its O-ring with gasoline.