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 pressure regulator) 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 .
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 (1) connection varies with each type of pipe (2). When reconnecting fuel or fuel vapor hose, be sure to connect and clamp each hose correctly referring to the figure.
After connecting, make sure that the hose has no twist or kink.

Fig 1: Identifying Fuel & Fuel Vapor Hose Connection Types (1 Of 2)
Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Identifying Fuel & Fuel Vapor Hose Connection Types (2 Of 2)
Courtesy of SUZUKI OF AMERICA CORP.
When installing fuel union bolt gasket, always use new gasket and tighten union bolt to specified torque according to Tightening Torque Specifications for fuel system.
When installing injector, fuel feed pipe or fuel pressure regulator, lubricate its O-ring with gasoline.
When connecting fuel pipe flare nut, first tighten flare nut by hand and then tighten it to specified torque.