The fuel pressure regulator on the Mazda3 is located at the end of the fuELRail connected to the injectors going back into the car. The fuel pressure regulator is a piece of the engine that is responsible for regulating the pressure of fuel that will cycle through the engine.Black smoke coming from Your vehicles tailpipe almost certainly signals an issue with the fuel pressure regulator. If Youre seeing black smoke, You should have the regulator checked or replaced as soon as possible. Normally if any smoke is emitted from Your tailpipe it should be white or gray, black smoke is an immediate signal of trouble.
Keven M
July 30, 2020
The fuel pressure regulator on the Mazda 3 is located at the end of the fuel rail connected to the injectors going back into the car.
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