My 03 cobra has a SES light on and the codes are P0190 and P0174. Would this be a weak fuel pump or is it the Fuel Rail Pressure Sensor? I just bought the car and Im new to the mustang scene so Im not sure what I should even be getting for fuel pressure. It has an aftermarket fuel pressure gauge thats only reading between 20 and 28psi which seems rather low to me. It has a Boost a pump installed and the knob is set to 40psi which still seems low to me but im just not sure if the gauge is reading low due to a bad sensor or if its a problem with the pump. Is the pump on this car inside of the gas tank or is it on top of the tank? The car also has methanol injection, does the fuel pressure need to be lower because its also spraying alcohol or should the pressure still be much higher than 20 to 28psi regardless? All of the mods were done before I bought the car so I didnt get to learn about everything as it when on like I usually would. Any insight would be appreciated. Thanks.