I did the 80 mPH test and placed the gear in neutral. The vibration still there. It's not really vibrating. Its kinda jump a bit at high speed. The engine mounts are seated right and tight. Idon't know if its the tire is unbalanced but I return the car to Peep Boys to have the front tires balanced. One thing I did last time, one of the rear tire has hole on it so I inflated it with the tire inflator (liquid) in a presurized can. Will this affect the cars vibration?
Any more possible caused of vibration?
Thanks in advance.

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