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Maintenance & Repair 350Z up keep and diagnosing/fixing problems

rattle from underneath when a/c is on

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Old Aug 7, 2008 | 02:10 PM
  #1  
Azn_Empurio's Avatar
Azn_Empurio
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Default rattle from underneath when a/c is on

getting this really annoying rattle coming from underneath the car which i cant pinpoint
it only seems to happen when the a/c is on -.-
sounds like a pipe rubbing another pipe, like a very quick "ting ting ting" type of sound(lol)
anyone have an idea of what it could be?
gonna take it in to my mechanic and see whats goin on i guess..
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Old Aug 8, 2008 | 01:17 PM
  #2  
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Is it coming from the exhaust? Check if rattle is identical to this sound: http://www.youtube.com/watch?v=beNjYlBrO4w

If it is, then it's b/c turning on AC raises the RPM by a little, and I guess that certain RPM is where vibration tends to be a little strong, causing the muffler to rattle.
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Old Feb 24, 2009 | 05:08 AM
  #3  
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ok, you pinpointed the problem, now how do we all fix it? does it when you accelerate and also when you let off the gas from reving it....is a little annoying.
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