I have a 2005 Mazda Tribute I, 2.3L, automatic, FWD, that has approximately 250,000 miles. The car stalls frequently whenever I try to accelerate at a medium-slow rate. I replaced a clogged fuel filter and replaced the fuel pump (separate problem), but it is still stalling. All spark plugs are functional. Does anyone know what the problem could be? How to fix it? How much it costs?

 

[QUOTE]p0191 Fuel Rail Pressure (FRP) sensor circuit performance/[QUOTE]
This is from the factory manual [QUOTE] 12 Fuel tank pressure sensor - The fuel tank pressure sensor, which is located above the fuel tank, near the fuel pump/fuel level sending unit module, measures the fuel tank pressure when the PCM tests the EVAP sys- tem, and it's also used to control fuel tank pressure by signaling the EVAP system to purge the tank when the pressure becomes excessive./QUOTE]
Hope this helps

 

Is your fuel cap tight with a good seal?