Sound from exhaust pipe - Mazda CX3 Forum
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post #1 of 4 Old 01-15-2019, 12:47 PM Thread Starter
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Sound from exhaust pipe

I'm having this weird sound from my exhaust pipe after driving.

What could it be?

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post #2 of 4 Old 01-15-2019, 06:58 PM
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Condensate in the exhaust?
Have been driving short distances in cold weather?

CX-3 2.0 SKYACTIVE-G Premium Plus 6MT AWD
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post #3 of 4 Old 01-17-2019, 08:59 PM
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JPA has it spot on, most likely condensation (could be from low grade gas, they have water mixed in from not cleaning the tanks very often)
and it freezes in line, then you drive and it heats up and starts to boil, but its trapped in silencer so the bubbles from the boil make it vibrate around in its little cell.

Try name brand mid grade gas, its not used as often so its cleaner, all tanks in ground get water in them, the more you use that tank,
the more the tanker has to refill which mixes the water with the gas and you get crap gas, so avoid real busy stations or use mid grade, also named gas stations
are required to clean the tanks and change pump filters once a month, they have quarterly inspections, mom and pop or 7-11 type stations dont have that, they only get inspected once a year.

Or it could just be purring cuz its a happy car...

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post #4 of 4 Old 01-18-2019, 06:21 AM
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I would try a good thrashing down a motorway
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