hey everybody i have an 04 rx8 sport w/68xxx miles and im starting to here what sounds like a marble noise coming from my motor.that i know of its the original motor.

 

Are you sure you are not hearing it from the cat? When is the last time you have changed your plugs, wires, and coils? also, pop off your cat and have a look-see inside to make sure it is okay and shat ain't broke loose and is rattling around.

 

well the plugs have about 10k on them and ive never changed the coils or wires as for the cat im supposed to be getting rb's dual res pipe soon.

 

OEM coils are only good for 30K. So, for starters, at least change your coils and wires. and since you have been running your plugs on old coils, I would replace those too. As for your cat, crack her open and have a look see. It may not be the prob, but if it is, you can get a new one for free and just put it on your wall for Emissions Inspections.

 

Oh, and upgrade your coils. Mazda designed an extraordinary car, but they failed on the coils. BHR is a good upgrade and there are others you can choose from.

 

yeah ign uprade was next after the ap and midpipe but 2 blown shocks and bald tires kinda wiped me out.as for the sound i used a mechanics stethsescope on my cars lower int mani and thats what i heard

 

Put it this way, you are over double what the coils are meant to last. When the coils go, the plugs go, and then the cat goes. No matter what, your next purchase should be coils and wires.

 

Search marbles in a can. or MIC Well known issue.