I can smell my exhaust fumes through my ac. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

baofrs · 02-06-2023, 09:15 AM

I have been dealing with this issue for more than a year now. When the ac is on and my car is just idling (windows up) I can smell every bit of my catless fumes coming through the ac. This applies to all my ac settings but whenever I have the recirculation on, the smell goes away. Also I forgot to mention that my cold air went out about a year ago aswell, not sure if this would have to do anything with the smells I'm facing. Has anyone else dealt with this issue? And if you have what did you do to diagnose/fix. Hopefully I haven't been breathing in carbon monoxide everyday for the past year.

Gruppe-S UEL catless headers
1320 dual resonated catless fp
Greddy rs single exit catback

RToyo86 · 02-06-2023, 09:34 AM

I would start by checking for exhaust leaks.

I ditched my catless front pipe due to fumes. Smell was an issue more often than not.

baofrs · 02-06-2023, 09:42 AM

Quote:

Originally Posted by RToyo86

I would start by checking for exhaust leaks.

I ditched my catless front pipe due to fumes. Smell was an issue more often than not.

Were you getting fumes from your ac aswell? After I installed the front pipe the smell definitely get worse.

Grady · 02-06-2023, 07:09 PM

Catless setup smells.

I would still check for header leaks in the engine bay.

And yes you have been breathing in CO. As long as the PPM is low and exposure time is low you will be fine.

Teseo · 02-06-2023, 07:19 PM

No OEM cats, will smell awful

Grady · 02-07-2023, 07:48 AM

Quote:

Originally Posted by Teseo

No OEM cats, will smell awful

But catless and E85 smells great!

RToyo86 · 02-07-2023, 09:49 AM

Quote:

Originally Posted by baofrs

Were you getting fumes from your ac aswell? After I installed the front pipe the smell definitely get worse.

On occasion the smell would get into the cabin with all of the windows up. Was worse with rear seats down which lead me to believe it was coming in via vent holes in the trunk.

It was hard to keep track of, any time I cracked the windows fumes were sucked into the cabin. Both windows all the way down was far less noticeable.

Teseo · 02-07-2023, 11:40 AM

Quote:

Originally Posted by Grady

But catless and E85 smells great!

But the craves of French fries...

Sapphireho · 02-07-2023, 11:48 AM

Quote:

Originally Posted by baofrs

Also I forgot to mention that my cold air went out about a year ago...

What?

x808drifter · 02-09-2023, 03:05 AM

Quote:

Originally Posted by baofrs

I have been dealing with this issue for more than a year now. When the ac is on and my car is just idling (windows up) I can smell every bit of my catless fumes coming through the ac. This applies to all my ac settings but whenever I have the recirculation on, the smell goes away. Also I forgot to mention that my cold air went out about a year ago aswell, not sure if this would have to do anything with the smells I'm facing. Has anyone else dealt with this issue? And if you have what did you do to diagnose/fix. Hopefully I haven't been breathing in carbon monoxide everyday for the past year.

Gruppe-S UEL catless headers
1320 dual resonated catless fp
Greddy rs single exit catback

Answered your question right there.
And no. The "CAI" will have nothing to do with it.

02-06-2023, 09:15 AM	#1
baofrs Junior Member Join Date: Jun 2022 Drives: 2014 Scion Frs Location: WA Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I can smell my exhaust fumes through my ac. I have been dealing with this issue for more than a year now. When the ac is on and my car is just idling (windows up) I can smell every bit of my catless fumes coming through the ac. This applies to all my ac settings but whenever I have the recirculation on, the smell goes away. Also I forgot to mention that my cold air went out about a year ago aswell, not sure if this would have to do anything with the smells I'm facing. Has anyone else dealt with this issue? And if you have what did you do to diagnose/fix. Hopefully I haven't been breathing in carbon monoxide everyday for the past year. Gruppe-S UEL catless headers 1320 dual resonated catless fp Greddy rs single exit catback Last edited by baofrs; 02-06-2023 at 09:40 AM.

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02-06-2023, 09:34 AM	#2
RToyo86 Senior Member Join Date: Mar 2018 Drives: 17 Asphalt 86 Location: Ottawa Posts: 2,172 Thanks: 1,710 Thanked 2,217 Times in 1,132 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I would start by checking for exhaust leaks. I ditched my catless front pipe due to fumes. Smell was an issue more often than not.

02-06-2023, 07:19 PM	#5
Teseo Senior Member Join Date: Jun 2014 Drives: frs Location: Gunsai Posts: 4,877 Thanks: 7,153 Thanked 2,922 Times in 1,769 Posts Mentioned: 23 Post(s) Tagged: 2 Thread(s)	No OEM cats, will smell awful

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