Question 1

How should fuel pressure be relieved and what precautions should be taken when servicing fuel hose or fittings on Mazda 3?

Accepted Answer

Before servicing any fuel lines or fittings, relieve the fuel pressure and either remove or disconnect the cable from the negative battery terminal. In a vehicle, the fuel supply line connects the fuel pump located in the fuel tank to the fuel rail on the engine. Similarly, the Evaporative Emission (EVAP) system lines connect the fuel tank to the EVAP canister and the canister to the intake manifold. When working underneath the vehicle, check all fuel and evaporative emission lines for leaks, kinks, dents, and other damage. If you find any, replace them immediately. When disassembling the unit, if you see dirt in the lines, disconnect all lines and blow them out with compressed air; also, check for damage and deterioration of the fuel strainer on the fuel pump pick-up unit. It is important to replace fuel lines with lines of equivalent type and specification. Some steel fuel lines have threaded fittings, and a mechanic holding the stationary fitting with a wrench may turn the tube nut. Only original replacement tubing should be used for any plastic tubing you replace in the fuel system. Be sure not to bend or twist the tubing too tightly as it is not heat resistant and it must not be exposed to any excess heat. When replacing any flexible hoses, use original equipment only. And do not route fuel hoses or metal lines within four inches of the exhaust system or within ten inches of the catalytic converter. Make certain that no rubber hoses are firmly fixed against the truck where vibrations might chafe the hose, causing it to leak. Wherever possible, maintain a clearance of at least 1/4-inch around rubber hoses or metal lines and ensure they do not touch the truck's underbody.

Question 2

How should fuel pressure be relieved before servicing fuel hose or fittings on Mazda Protege?

Accepted Answer

The pressure in the fuel line should be relieved always. Metal fuel supply and vapor lines run from the fuel tank to the engine compartment and are fastened to the underbody or frame with plastic retainers. Flexible hoses connect metal lines to either the fuel tank, fuel filter or a fuel rail. Fuel lines must be inspected periodically for leaks or damage. Repair of metal lines can be done using steel tubing of the damaged part's diameter, with the correct fittings. However, flexible lines must be replaced with factory parts as high pressures are involved. Do not use rubber hoses and clamps for repairs on steel lines, which are only to be used on flexible hydraulic lines. During disassembly, if the system or fuel filter has contamination visible, disconnect and blow out the line, and check the fuel strainer on the fuel pump module for damage. Fuel lines or hoses should not be routed within four inches of any part of the exhaust system or within ten inches of the catalytic converter and must not chafe against the engine, body, or frame. There must be at least a 1/4-inch clearance. While removing the fuel line, unbolt all the bolts attaching the fuel line to the body of the unit. Also, do keep in mind the high pressure. Fuel lines installed on fuel-injected vehicles need a high-pressure system. For replacement of steel fuel line or emission line, install steel tubing approved by the manufacturer (i.e. the manufacturer of your vehicle, engine or kit) as copper or aluminium tubing will not withstand typical vibration of the automobile. Certain fuel lines come equipped with threaded fittings that contain O-rings. When taking these apart, always use a flare-nut wrench and a backup wrench. Check all O-rings for cuts or deterioration and replace any that look worn or damaged. Use a component that is either OE or equal at a minimum when replacing lines. Mazda uses a lot of types of connection methods to connect the fuel lines. Most flexible fuel lines are attached using conventional clamps that can be removed with pliers or a screwdriver. This way, you can ensure that there is a proper overlap. Also, remember to attach a new hose clamp between the rubber hose and metal lines when connecting it. The 1999 and later models have plastic fuel lines with quick-disconnect fittings. Remove the lock clip and rotate the tab to release these fittings to separate the lines. Prior to doing this, clean the area around the fittings. Quick-connect fittings are not subject to servicing, and damaged lines must be replaced. Removing the line will have to start with the engine oil of the machine. The first process of cleaning the disable quick-connect fittings and wipe them with a lint-free cloth in case we have two ends of line fittings in the engine. Meantime installing of line it will identify by black letters or otherwise find out by internal spring lock and cautioning new O-rings at threaded fittings if equipped and finally when by switching key On-Off several time while check leaks before start engine.

Genuine Mazda Fuel Hose

87 Fuel Hoses found

Mazda Filler Hose Part Number: GJR9-42-231B

Mazda Connector Hose Part Number: NC10-42-231

Mazda Filler Hose Part Number: BJS7-42-231A

Mazda Pipe Part Number: TK48-42-51Y

Mazda Vent Tube Part Number: GJR9-42-51Y

Mazda Filler Hose Part Number: BFD1-42-231

Mazda Pipe Part Number: T002-42-180

Mazda Vent Hose Part Number: GD7A-42-571A

Mazda Hose Part Number: GJR9-42-568

Mazda Filler Tube Part Number: EC05-42-232

Mazda Vent Hose Part Number: T001-42-232

Mazda Connector Hose Part Number: DB4J-42-22X

Mazda Connector Hose Part Number: DA8A-42-22X

Mazda Filler Hose Part Number: KB8F-42-231A

Mazda Breather Tube Part Number: LF37-42-22X

Mazda Breather Tube Part Number: GD7A-42-564

Mazda Breather Tube Part Number: CG36-42-23X

Mazda Filler Hose Part Number: BDTS-42-231B

Mazda Breather Tube Part Number: BBM2-42-23XB

Mazda Pipe Part Number: KB8F-42-287

Mazda Fuel Hose

Mazda Fuel Hose Parts and Q&A

Related Mazda Parts

Browse by Model