So for the past several days I have started my car it begins to make this grinding/groaning sound and I can feel it in the brake pedal. Before it would happen at startup and then go away, but now has graduated to still being there as I'm driving, up to 5 miles of city driving. I have an automatic trans so idk if I need as trans flush or not. I'm not like liking how this is getting worse, please help

 

I'd say pull the wheels off and inspect the brakes. If it's not that it could be a bearing somewhere.

 

My alternator went bad and it made a hell of alot of noise, never felt it through the brake pedal though, but it's worth listening closely under the hood if it is also doing it while idling and not in gear.

 

Thanks, I'll look into it because when the car starts up it makes it for a while and doesn't go away until it's at operating temperature. I can feel it most while just having my foot resting on the brake pedal, not depressing it. I can actually feel it slightly just being in the car. The brakes work fine.

Idk if it's the problem, I just hope it's not an expensive repair. It sounds like someone dragging a metal file cabinet along concrete...

 

Read this thread and see if it applies to your situation. There are good descriptions and videos as well as a solution. It might not be your problem, but its worth looking at.

http://forums.maxima.org/4th-generat...tion-idle.html

 

Oh my god, thank you so much. The video provided on the second page is exactly how my car has been acting lately and sounds exactly the same. I'm surprised that the fuel filter is the problem though, didn't expect that. Looks like its time to upgrade to a 300zx fuel filter

 

We never determined whether it was the pump, filter or FPR causing the harmonics. Let us know how the filter does. Mine started doing it again last week, weather is getting warmer now.