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rpm noise?

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Old 05-19-2009, 11:05 AM
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rpm noise?
i have a 2000 civic ex and whenever the rps get to 2700 rpm it makes a humming/ buzzing noise ONLY at that rpm in every gear. i can hold the rpm at 2700 and it doesnt stop buzzing but it goes away when i accelerate or decelerate from that rpm. does anyone know what it could be??
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Old 05-19-2009, 11:07 AM
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Default Re: rpm noise?
Originally Posted by silverdino
i have a 2000 civic ex and whenever the rps get to 2700 rpm it makes a humming/ buzzing noise ONLY at that rpm in every gear. i can hold the rpm at 2700 and it doesnt stop buzzing but it goes away when i accelerate or decelerate from that rpm. does anyone know what it could be??
Something is resonating at that exact harmonic frequency
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Old 05-19-2009, 11:07 AM
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Default Re: rpm noise?
maybe the heat sheilds rattling or is your cat gutted or anything? I put a factory axle back on an aftermarket midpipe and hear and it would have an annoying ass rasp around 3k rpm
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Old 05-19-2009, 11:11 AM
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Default Re: rpm noise?
Originally Posted by CustomX
your cat gutted or anything? I put a factory axle back on an aftermarket midpipe and hear and it would have an annoying ass rasp around 3k rpm

everthing on the exhaust is stock. it be some loose metal or something resonating? what could be some possibilities?
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Old 05-19-2009, 11:12 AM
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Default Re: rpm noise?
Originally Posted by silverdino
everthing on the exhaust is stock. it be some loose metal or something resonating? what could be some possibilities?
It could be anything.

I recommend having someone sit in the car, rev to that rpm and hold it while you walk around and listen
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Old 05-19-2009, 11:15 AM
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Default Re: rpm noise?
thanks ill try that. its not bad right now but my gf has the same problem but her's is REALLY bad and i dont want mine to get to that point.
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Old 05-19-2009, 11:19 AM
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Default Re: rpm noise?
your girls can is loose, wut?
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Old 05-19-2009, 11:23 AM
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Default Re: rpm noise?
something is resonating when she hits a certain rpm but hers sounds like her car is going to blow up. she drives a toyota rav4
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Old 05-20-2009, 07:50 PM
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Default Re: rpm noise?
took off the heat sheild underneath the cat. converter and the header and it still makes that noise. what else could be resonating?!
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Old 05-22-2009, 02:59 PM
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Default Re: rpm noise?
broken catalyst? resonator crapping out? muffler?
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