It's a raspy sound that almost sounds like air or maybe even like a slight grinding noise. It sounds like its coming from below the inlet and fairly central but I can't pin point exactly where it's coming from.

The sound can be heard slightly when the car is idling, and does not increase with revs. However, while driving in gear it appears to become more prominent with higher revs.

At first I thought it was air and thought maybe the seal on the inlet but i've tested this and there are no leaks. Now I'm beginning to think it sounds more mechanical

Also more often than not now when I turn the car off it almost sounds like the cause of the noise winds down after everything else and makes a sound like someone taking a deep breath in and out.

Maybe a knackard bearing/pully or something?

Any ideas will be much appreciated as I'm starting to get paranoid

Many Thanks

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Ex Bianca 6 Owner R.I.P

Mazda RX7 FD3s - Daily...

Sounds like you are describing the same noise I have.

Haven't got round to removing the aux belt yet to test but i've been advised to try that by other forum members as well.

Keep us updated?

Cracked/broken resonator box?

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Youll need to take the inlet manifold off to check it, but it usually causes rough running as it will be leaking air into the engine.

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Spanner Monkeys Monkey Spanner
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here's a video I have from a few months back

youtube

Sounds similar but it's hard to say, tbh mine doesn't really sound anything like it does in the video as the mic just couldn't take it.

Mine seems to get quieter if the engine is warm? Engine runs sweet, no hesitation, dodgy idle and pulls well.

Yeah sounds like the exact same noise to me mate.

Mines running fine and doesn't show any signs of an air leak or anything like that.

If you drive along with the windows down and put your foot down, can you hear the noise a fair amount?

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Ex Bianca 6 Owner R.I.P

Mazda RX7 FD3s - Daily...

Has this turnt out to be the bottom engine pulley, if this is the same with you I would get it changed fast as if it goes it's right next to the cambelt and could damage it. Just worth a check mate.

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cherry p1.....SOLD (regreting this)
blaze p2.....why did i buy this SOLD
Black p3

Yup

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cherry p1.....SOLD (regreting this)
blaze p2.....why did i buy this SOLD
Black p3

Why dont you buy a bung from for sale and take it off?

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cherry p1.....SOLD (regreting this)
blaze p2.....why did i buy this SOLD
Black p3