Exhaust sound

[juanp.sandoval]

My 2015 mustang GT with only h-pipe muffler delete and axle back exhaust has had a tea kettle sound for the last few months. Haven't been able to pin point the root cause. Since last week I have been smelling burnt rubber after a drive (nothing underneath). No exhaust leak after 3 exhaust shop opinions. I am left to believe it may be my catalytic converters. I'm at 86,000 miles now. What are your thoughts?

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[sms2022]

Doubtful it is your cats causing the smell. A blown cat will sound like marbles under a car. Probably you have a minor oil leak dripping somewhere that it’s burning.

 

[junits15]

do you have those exhaust clamps with the little piece of black tar in them?

 

[black22gt]

It would also smell like rotten eggs if it was the cats going. From what you describe it sounds like a pinhole exhaust leak, maybe directly hitting some rubber somewhere. See if your tires dont have any mystery melting marks.

Have you checked around your coolant lines? I suppose a pinhole in one of those tubes could do a similar sound, maybe melting the hose? Just spitballing here tbh.

Tell us more about the tea kettle sound. Does it change with throttle/rpm? Happen at idle? Can you replicate the sound and check under/around the car to see if you can tell where its coming from?

 

[Crew4991]

Burning rubber?
Well, don't mash the throttle and spin the tires so much!

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