Need help, White dust in the exhaust - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DVH96 · 02-21-2021, 11:17 PM

I came back from work today. When I got home I realized there is white dust inside my exhaust tips. The car felt fine. Checked for codes and nothing showed up. Any ideas or tips would be appreciated! Name: WhatsApp Image 2021-02-21 at 2.36.01 PM.jpg
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Name: WhatsApp Image 2021-02-21 at 2.36.01 PM.jpg
Views: 920
Size: 319.7 KB

BlOody_BoOger · 02-21-2021, 11:24 PM

Quote:

Originally Posted by DVH96

I came back from work today. When I got home I realized there is white dust inside my exhaust tips. The car felt fine. Checked for codes and nothing showed up. Any ideas or tips would be appreciated!Attachment 197708

If you have an open flash. Or ecutek to see data logs. Look to see if your not running lean. It could be that.

Sent from my IN2017 using Tapatalk

DVH96 · 02-21-2021, 11:59 PM

Quote:

Originally Posted by BlOody_BoOger

If you have an open flash. Or ecutek to see data logs. Look to see if your not running lean. It could be that.

Sent from my IN2017 using Tapatalk

Checked the AFR and it seems to be in a good range when under load.

FR-S2GT86 · 02-22-2021, 12:28 AM

I was going to ask you what that white dust tastes like thinking it's road salt, but I see that you're in Mexico.

I'll guess maybe coolant residue from a possible blown head gasket?

DVH96 · 02-22-2021, 12:39 AM

Quote:

Originally Posted by FR-S2GT86

I was going to ask you what that white dust tastes like thinking it's road salt, but I see that you're in Mexico.

I'll guess maybe coolant residue from a possible blown head gasket?

OHH noo. I thought about it. Did the basic checks, no brown oil, no coolant discolor, no white smoke, no overheating. I guess ill take it to the mechanic shop this week for further inspection.

Impureclient · 02-22-2021, 01:28 AM

Check for catalytic converter failure.

SuperSub7 · 02-26-2021, 08:33 PM

going to second about the catalytic - might want to check that out.

CB750F · 02-27-2021, 12:42 AM

Sorry op, I can't help it....

whataboutbob · 02-27-2021, 12:04 PM

I had the cat in my stock header fail at one point and it covered the entire rear bumper of the car with dust that looked just like that.

norcalpb · 02-27-2021, 04:37 PM

Quote:

Originally Posted by FR-S2GT86

I was going to ask you what that white dust tastes like thinking it's road salt, but I see that you're in Mexico.

I'll guess maybe coolant residue from a possible blown head gasket?

Well since he’s in Mexico maybe he ran over a brick of cocaine? /S

OP it’s probably your cat as mentioned above.

Grady · 03-01-2021, 01:50 PM

Could be running lean. Has the car been modified or tuned?

Palmermc · 08-13-2021, 01:03 AM

Hello,
I was curious if you ever figured out what was causing the white dust. I had exactly the same thing happen to my car this past weekend. Also nothing weird with the oil or coolant. I’m suspecting a damaged cat. Eager to hear what you learned.
Thanks,
Mark

zc06_kisstherain · 08-31-2021, 02:21 PM

Quote:

Originally Posted by Palmermc

Hello,
I was curious if you ever figured out what was causing the white dust. I had exactly the same thing happen to my car this past weekend. Also nothing weird with the oil or coolant. I’m suspecting a damaged cat. Eager to hear what you learned.
Thanks,
Mark

replace front pipe with catless pipe (upgrade) and see what happens

RZNT4R · 08-31-2021, 04:08 PM

Quote:

Originally Posted by zc06_kisstherain

replace front pipe with catless pipe (upgrade) and see what happens

Code:

Palmermc
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I think what'll happen is his car won't smog and he's going to be SOL.

02-21-2021, 11:17 PM	#1
DVH96 Junior Member Join Date: Feb 2021 Drives: Brz 2016 Location: Mexico Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Need help, White dust in the exhaust I came back from work today. When I got home I realized there is white dust inside my exhaust tips. The car felt fine. Checked for codes and nothing showed up. Any ideas or tips would be appreciated!

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Palmermc Junior Member Join Date: Aug 2021 Drives: 2013 BRZ Location: CA Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hello, I was curious if you ever figured out what was causing the white dust. I had exactly the same thing happen to my car this past weekend. Also nothing weird with the oil or coolant. I’m suspecting a damaged cat. Eager to hear what you learned. Thanks, Mark

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