New custom exhaust, car vibrating when idle???

DeezSi06 · 09-19-2006, 07:26 PM

I got a custom exhaust with no resonator and a magnaflow performance muffler put on.
Car ran fine, but it was 2 loud for me.
So i returned to the shop today and had them add a resonator to lower its noise.
They added the resonator pretty much touching the cat.
Well now I LOVE THE SOUND of the car.
Its not loud at all.
But i noticed today that at idle, it runs a little rough,
I can feel a very faint vibration in steering wheel and shifter...
Once i turn the AC/HEAT on the vibration more then doubles.
This all happens at idle.
Once i give it some gas, all vibrations go away..
Does anyone know why this would happen?
Without the resonator it didnt vibrate at all...

Kakashi · 09-19-2006, 07:47 PM

well, im no expert at resonators, but the resonator is attached to your car, and if its dampening the noise, it must be absorbing the vibrations..

so if its attached to your cat, and thats attached to your piping, which is attached to your body, wouldnt it increase the vibrations....everywhere?

thats just my thought..

**Silver8th** · 09-20-2006, 11:07 PM

The exhaust is probally rubbing on the body somewhere. Take it back to the installer and have them fix it.

DeezSi06 · 09-21-2006, 01:44 AM

yea the hanger was to tight. losened it and now its perfect.

09-19-2006, 07:26 PM	#1 (permalink)
DeezSi06 Senior Member Join Date: Aug 2005 Posts: 518 iTrader: 0 / 0%	New custom exhaust, car vibrating when idle??? I got a custom exhaust with no resonator and a magnaflow performance muffler put on. Car ran fine, but it was 2 loud for me. So i returned to the shop today and had them add a resonator to lower its noise. They added the resonator pretty much touching the cat. Well now I LOVE THE SOUND of the car. Its not loud at all. But i noticed today that at idle, it runs a little rough, I can feel a very faint vibration in steering wheel and shifter... Once i turn the AC/HEAT on the vibration more then doubles. This all happens at idle. Once i give it some gas, all vibrations go away.. Does anyone know why this would happen? Without the resonator it didnt vibrate at all...

09-20-2006, 11:07 PM	#3 (permalink)
Silver8th Join Date: Sep 2005 Location: GA Posts: 6,818 EARL iTrader: 4 / 100%	The exhaust is probally rubbing on the body somewhere. Take it back to the installer and have them fix it. __________________

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09-19-2006, 07:47 PM	#2 (permalink)
Kakashi Senior Member Join Date: Sep 2006 Location: Aurora CO Age: 22 Posts: 3,707 iTrader: 1 / 100%	well, im no expert at resonators, but the resonator is attached to your car, and if its dampening the noise, it must be absorbing the vibrations.. so if its attached to your cat, and thats attached to your piping, which is attached to your body, wouldnt it increase the vibrations....everywhere? thats just my thought..

09-21-2006, 01:44 AM	#4 (permalink)
DeezSi06 Senior Member Join Date: Aug 2005 Posts: 518 iTrader: 0 / 0%	yea the hanger was to tight. losened it and now its perfect.