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i just finished installing my tanabe hyper medalion and when i rev it in the garage it sounds great, but when i take it out it starts to rattle with a sputtering sound.....any idea what this is? it might be just a bolt thats not tightened enough but i'm not sure

any help is appreciated

searched but didn't find answer i wanted

 
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ok it could be three things......

here's what happend to me.

1) bolt was loose
2) 02 sensor wasn't plugged in all the way (doubt this happend to you)
3) It was hung to high and started hitting the car whenever I would come off the gas....<---look into that one,.

 
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ITS PROBALY HUNG TOO HIGH, HAD SAME PROBLEM WITH MY EXHAUST.

 
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yeah i think its hung to high cause it sounds great when i'm just in the garage and haven't moved at all, but then i get out on the street and it starts goin crazy

how do i fix this?

 
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i had some weird noises when i first got my exhaust as well.....when i just rev...it would be ok...but the min i gun it ...lets say at the light....there would be some weird clankin tightening sound.....so i went to the muffler shop and they said that the piping was rubbing against the body and the only thing they can do was to flatten the top portion of the pipe

 
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damnnnnn.....how did you do that??

 
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Check your rear pipe, it might be hitting the sway bar like mine did.

 
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alright thanks for the help dudes......i'll update this tomorrow to tell if i got it fixed

 
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mine hits too...do a search on it in the forum section thing it's been talked aboot b4

 
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It's your exhaust system! hitting on the bottom of the vehicle where the aluminum heat shield are located, one under next to your cat and one next to your rear right tire. I don't wanna take the shield off either. I can't do anything on it, so I just have to deal with it.