[Peugeot-L] 405 Mi16 - new exhaust, car still gets loud and "pffffft" like when hot - > cat??

From: Paul Hughes <pjphughes_at_yahoo.com>
Date: 08/31/06


Hi everyone,

With a new middle and rear exhaust system on the '91 OnMi16, the car starts out sounding perfect...after 15 minutes or so, it gets the same "pffttt" or even a puttering buzz noise that it had before. Basically right under the driver's seat....

I assume that now there wouldn't be a leak at the cat...so either the cat gets loud as it gets hot, or there is somewhere in front of the cat that has a leak...

I replaced a rattly cat on my '89 that rattled after it got hot. Is this the likely culprit again? Or an issue at the exhaust downpipe (as I look at my Haynes manual) My guess is yes. Ugh..and this means the exhaust system was probably ok...

Thanks in advance!
Paul

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