Precautions on Fuel System Service
Work must be done with no smoking, in a well-ventilated area and away from any open flames.
As fuel feed line (between fuel pump and fuel delivery pipe) is still under high fuel pressure even after engine was stopped, loosening or disconnecting fuel feed line directly may cause dangerous spout of fuel to occur where loosened or disconnected.
Before loosening or disconnecting fuel feed line, make sure to release fuel pressure according to Fuel Pressure Relief Procedure:M13A . A small amount of fuel may be released after the fuel line is disconnected. In order to reduce the chance of personal injury, cover the fitting to be disconnected with a shop cloth. Put that cloth in an approved container when disconnection is completed.
Never run engine with fuel pump relay disconnected when engine and exhaust system are hot.
Fuel or fuel vapor hose connection varies with each type of pipe. When reconnecting fuel or fuel vapor hose, be sure to connect and clamp each hose correctly referring to the figure Hose Connection.
After connecting, make sure that it has no twist or kink.
[A]: With short pipe, fit hose as far as it reaches pipe joint as shown.
[B]: With following type pipe, fit hose as far as its peripheral projection as shown.
[C]: With bent pipe, fit hose as its bent part as shown or till pipe is about 20 – 30 mm (0.79 – 1.18 in.) into the hose.
[D]: With straight pipe, fit hose till pipe is, about 20 – 30 mm (0.79 – 1.18 in.) into the hose.
1. Hose
2. Pipe
3. Clamp
4. Clamp securely at a position 3 – 7 mm (0.12 – 0.27 in.) from hose end.
5. 20 – 30 mm (0.79 – 1.18 in.)
When installing injector or fuel delivery pipe, lubricate its O-ring with spindle oil or gasoline.
When connecting fuel pipe flare nut, first tighten flare nut by hand and then tighten it to specified torque.