ccharlie said:
Previous posts said that the fuel pump is in the engine or engine area. How could this work if that is true? I have a noisy motor and some suspect that the fuel pump is the culprit among other things.
As mentioned below......You have a "cam" driven fuel pump in the engine, and a tank fuel pump to send fuel to the mechanical. I was told the pump in the tank is high pressure as well, being its what makes the "returnless" fuel system possible. Its suppose to provide a continous pressure to the engine bay, what the pressure is I have no idea...
Your noisy motor is what is known as Direct Injection....It sounds similar to a diesel engine in idle, that is becuase the technology in direct injection and diesel injection is VERY similar...in fact nearly the same. Alot of that sound you hear is the valve train (2 cams, 16 valves 1 timing chain (chains are noisey vs belts but reliable), the DI injectors (which are actually more like a high pressure soleniod valve...they are the sound most people here squirt, squirt, squirt) and then the cam rail fuel pump