Suggestions to fix rattling problems in Mustang?

[-DarkMatter- 10+ year member]

//content.invisioncic.com/y282845/emoticons/banghead.gif.8606515f668c74f6de0281deb475b6fd.gif Anyone else here have a late 90's Mustang that can give some tips on how to fix rattling? I've already got dynamat all throughout the trunk compartment, but I'm still getting rattles from the Trunk itself at high volume, and the rear deck area even with the back seats folded down.

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[spudracer326 10+ year member]

have you checked your liscence plate....on my sisters car that and the spoiler were 90% of the problem

 

[ramos 5,000+ posts]

Describe the rattling. Is it metal hitting metal, plastic hitting metal, something else ? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[-DarkMatter- 10+ year member]

Its the cover that sits over the rear deck that rattles at high volume, and I was thinking maybe putting a layer of dynamat extreme over the metal under the cover might help? There are a few factory holes cutout in it, and covering those up might improve my bass response a bit as well since those let air escape from the trunk area.

 

[Rsx_03 10+ year member]

people purposely put holes in there back dash to let more air into the cabin ... the dynamat suggestion sounds good but i would also try to silicone hard parts of your dash cover that touch metal