This is a Fuel System or Fuel Pump Problem. Some Mazda owners report hard starting, hesitation under acceleration or load, or a loss of power related to fuel system issues, especially on higher‑mileage vehicles or those with contaminated fuel.
What needs to be repaired or replaced?
Diagnosis usually includes testing fuel pressure and volume and checking for restricted fuel filters; repairs may involve replacing the in‑tank fuel pump assembly and fuel filter, and cleaning or replacing clogged fuel injectors.