i can't find a leak anywhere. it was suggested to me that it may be a fin or something that cameloose in the catalytic converter. setting still racing the motor it won't make the noise, but when the engine is cold and under acceleration you can hear it. it runs great but makes that noise. any ideas?
i have a noise that sounds like an exhaust leak type of noise on 2004 Chrysler PT Cruiser
Most likely you have an exhaust gasket or seal that when is cold, it leaks.