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#4655625 - 02/04/18 09:07 AM What makes that hot cat smell?
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1663
Loc: Crawfordville FL
What’s going on when you floor it for a minute or two and your cat gives off that hot cat smell. Also noticed when the driver ahead of you floors it to haul buggy around a slow driver.

Some of it seems to be a hint of sulfur, that makes sense to me since the engine will be in open loop and running rich. What’s the rest? Are deposits in the cat burning off?
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4655632 - 02/04/18 09:11 AM Re: What makes that hot cat smell? [Re: SilverFusion2010]
eyeofthetiger Offline


Registered: 11/18/17
Posts: 683
Loc: South Carolina
I believe it is because of the sudden change to a high volume of a rich fuel mixture. I'm just glad this is about catalytic converters and not kitty cats.
_________________________
2017 Ford Fiesta 1.0T - Valvoline SynPower 5W-20, Motorcraft FL910S
1988 GMC K1500 4.3/700R4 - Supertech 15W-40, Fram TG3980
1986 Ford Ranger 2.0 - uhh

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#4655637 - 02/04/18 09:16 AM Re: What makes that hot cat smell? [Re: eyeofthetiger]
Kira Offline


Registered: 08/19/10
Posts: 5250
Loc: Champlain/Hudson Valley
We too were sniffing our cat as I read the title. "How opportune that Malcolm is sleeping near the radiator", I said.

I think both smells of instant operation as well as burn off is occurring when you punch it. I love scorching up a long hill for reasons such as this.

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#4655801 - 02/04/18 11:28 AM Re: What makes that hot cat smell? [Re: SilverFusion2010]
malibuguy79 Offline


Registered: 12/11/17
Posts: 86
Loc: Maryland
It tends to be worse on cars that dont get driven hard often. Its perfectly normal during WOT situations like that. Cars that get driven hard usually dont put off much smell beyond raw fuel
_________________________
Greg...the exhaust guy
I have a 10 Yaris, 97 Tercel 1nzfe swap coming, 82 Malibu 1uzfe swap in progress
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