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Message: <blockquote data-quote="MORDENENOUGH" data-source="post: 140231" data-attributes="member: 9439"><p>It sounds to me like a chugging sound but a bit high pitched. I thought maybe a leaking intake gasket. Now the vibration and noise are more noticeable when in fourth or fifth gear on the highway and you put your foot on the floor. At cruise as long as you keep the rpm's down you don't notice these problems as much. When it idles nothing out of the ordinary but snap the throttle and as the rpm's come down the vibration shows up. Now someone said maybe the motor mounts are bad, I have new prothane;s but haven't got them in yet but I do have a energy suspension tranny mount already on the car. Do you think this is causing the vibration? Now the oil pressure is good and no engine codes and a full tune has been done, the other possible item I thought of was a header or cat bouncing off or close to the floor but I haven't been able to find any marks to show this. Any advise would be appreciated.</p></blockquote><p></p>