Strange muffler...
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Strange muffler...
If I start my 2001 Mountaineer (5.0L V8) and drive away while it's still cold, the engine sounds really loud around 55 mph. If I let it warm up first, it's relatively quiet unless at some point I floor it, then it gets loud again.
I've checked for holes and there are none.
Yesterday, a new twist was added: now it sounds really loud taking off (very rumbly). Again, checked for holes and there are none. I put a heavy glove on and put my hand in front of the exhaust (not plugging it of course) it again gets quiet.
Thoughts? I have no idea...
I've checked for holes and there are none.
Yesterday, a new twist was added: now it sounds really loud taking off (very rumbly). Again, checked for holes and there are none. I put a heavy glove on and put my hand in front of the exhaust (not plugging it of course) it again gets quiet.
Thoughts? I have no idea...
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Joined: Oct 2005
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From: Toronto
I had a Lincoln once that a piece of the catalytic converter broke off internally and was bouncing around inside the exhause system. It would periodically get lodged and the the noise would stop. It was a loud metallic rattling sound.
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From: Toronto
The catalytic converter problem was a loud metallic rattling sound. Spitting sound? Does it run smoothly aside from the noise? Is is running on all 8 cylinders?
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Originally Posted by Ray_K
The catalytic converter problem was a loud metallic rattling sound. Spitting sound? Does it run smoothly aside from the noise? Is is running on all 8 cylinders?