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Bad vibration during cold start
During cold starts only as the revs start to come down, as soon as it hits about 1100-1200 rpms, the exhaust vibrates badly. It can be felt and heard from inside the car. It does it twice during cold start and ruins the sound experience every time I start the car from cold.
Anyone know what might be causing this or how to trouble shoot to isolate it? If I get out the car and look at the tips I can see them go into a high speed/frequency vibration. It only last for a split second each time but sounds terrible. As soon as the revs come down to normal everything is good. Also I cannot induce this vibration while revving the car on my own.
Thoughts?
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