![]() You can learn more about symptoms of a bad fuel pump with our helpful article, and shop O'Reilly Auto Parts to find the right fuel pump, fuel filter, or fuel system repair parts you need to keep your car on the road. If the fuel pump is still working intermittently, you may also notice misfires or your engine could run rough or stall, which could leave you and your vehicle stranded. If your fuel pump is no longer turning on or is worn out, you may hear a whining noise from the fuel tank or it may fail to make any noise at all. If you try to start your car and it won't fire up, you can often listen near your fuel tank when you turn the key on. This may be related to a failure in the fuel pump, the fuel pump relay, the cutoff relay, or a variety of other factors that may need proper diagnosis. Mechanical and electric fuel pumps can wear out, clog, or lose capacity over time, or they may suddenly fail to operate entirely. These electric fuel pumps are activated as soon as you turn the key to deliver fuel to fuel rail(s) and injectors and to build fuel pressure for startup. Shop 2003 Mazda Protege 5 HATCHBACK 5 RELAY, NORMAL OPEN. On a 2002 mazda 626 with the 2.5l dohc engine. the fuel pump is not turning (no power to the. ![]() ![]() Mazda 0l 1998 mazda 626 engine diagram I have a 2002 mazda 626. I bought a 2002 mazda 626 2.5 liter v6 recently. On older vehicles, a mechanical fuel pump was used that was driven by the camshaft and employed a rubber diaphragm to create suction, but on most modern vehicles, an electronic pump located in the fuel tank pumps the fuel through the rest of the system. Genuine Mazda Part - B5B4-18-821 (B5B418821) Skip to Content. 1993 mazda 626 engine diagram Mazda 0l 2001 2002 mazda 626 wiring diagram manual original. The fuel pump creates a vacuum that pulls fuel from the gas tank and pressurizes it for use in the fuel delivery system. ![]()
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