Exhaust smell in cabin - after new Cats installed
Hello!
I have a 2003 Corvette zo6. I just had a set of new cats installed at an exhaust shop. This is the part: Magnaflow 93989 | CHEVROLET CORVETTE | 5.7L | Catalytic Converter-Direct Fit | Standard Grade EPA Before install there was no exhaust smell in the cabin when I Idle. however after install the smell is there, only when I dont move (which makes me think its at the front of the car). I took it back to the shop and they didn't see any leaks in the weld joints. Anyone have this issue before? I didn't buy a gasket for the new cats - and no one advised me to get one could that be my issue? any help would be appreciated! |
Does it actually have the pup cats as shown?
Were the previous cats done for, or PO removed? Yes the gasket may be the cause. Did they run a smoke test or just visual? The smell will only be pronounced when sitting still generally. |
yea they had the pup cats, everything in the picture here is the part: https://www.hottexhaust.com/Magnaflow_93989
they just did a visual check, no smoke test. My previous cats were done for - i was getting the cat code on the driver side. My O2 sensor voltage proved that the cat was in fact bad (I graphed the voltage). |
Originally Posted by slang
(Post 1598137261)
I graphed the voltage
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For me when I added new high flow metallic cats I had a very strong smell that you could smell inside the cabin for awhile until they get “broken in”. It’s normal |
Originally Posted by bwill03z
(Post 1598138494)
For me when I added new high flow metallic cats I had a very strong smell that you could smell inside the cabin for awhile until they get “broken in”. It’s normal |
When I did my Trans Am LS1 it took about 2 months for the smell to go away. If you drive less it will take longer.
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Originally Posted by slang
(Post 1598141449)
Do you by chance remember roughly how long? I have had them installed for a little over 2 weeks and she is my daily driver.
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Now that you've done the cats maybe you should consider changing the O2 sensors.
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