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740 exhaust is loud and does not sound right 700

posted by  jsbaker on  Tue May 14 06:46 CST 2002
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I am having the same exact thing. Sounds like it has a flowmaster on it or something. Plug the pipe and the car runs. I can not find a leak at the manifold outlet but I suspect that is where it is. I already have the gasket for it, since the idiots at autozone tried to tell me it was the donut gasket for the cat. I have checked that spot though and can not find anything. It sounds like it is coming from near the bottom of the engine or under the passenger seat. I am going to find some pentrating spray today and pull the flange loose and check that one. if nothing else I have plans to replace from the manifold back, including the cat. in July. Someone had a cheapo muffler put on and it's starting to rust out. But my noise does start at about 2000 rpm.






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