I have a problem with my 2.3L 2005 Mazda Tribute. It displays the error code "P0193 - Fuel Rail Pressure Sensor Circuit High Input". While accelerating, the car will intermittently lose power. It kind of feels like a transmission thump, but it is a fuel system problem. I will have the gas pedal pushed down, but the car will start decelerating. Sometimes I can start pumping the gas pedal when this happens and the vehicle will eventually start accelerating again and sometimes the car will decelerate about 20 mph until it shuts off. Sometime the car starts fine, other times it cranks but does not turn over. I took it to Mazda to have it diagnosed. They told me that it was a bad fuel pump. I replaced the fuel filter and pump, with no improvement. I also replaced the fuel rail pressure sensor, also with no improvement. Any suggestions?