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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 07-22-2015, 08:22 AM   #1
nickmerronesucks
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oil smell from exhaust..catless?

This is not a cam plate leak.


Ever since ive gone catless i smell the catless smell and some oil from exhaust occassionally...is this oil smell a concern or normal with our cars catless?
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Old 07-22-2015, 08:43 AM   #2
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might be a coating on the new pipe burning off. How long has it been on?
Brand?
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Old 07-22-2015, 09:20 AM   #3
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Ever since ive gone catless i smell the catless smell and some oil from exhaust occassionally...is this oil smell a concern or normal with our cars catless?
I noticed this too when I went catless. No problems so far and no oil consumed by the engine. I think its just one of the joys of being catless.
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Old 07-22-2015, 10:21 AM   #4
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It's cuz you're careless and you'll notice is more when you're at a stop light. Or you can also have an exhaust leak down there and you don't know about it...
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Old 07-22-2015, 11:41 AM   #5
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I do have an exhaust leak at the over pipe but not worrying about it until i install my turbo kit. just wanted to make sure this was OK. Not new materials burning off. No noticeable oil consumption As Takumi788 stated. so im gonna write this off as okay
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Old 07-22-2015, 11:46 AM   #6
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I do have an exhaust leak at the over pipe but not worrying about it until i install my turbo kit. just wanted to make sure this was OK. Not new materials burning off. No noticeable oil consumption As Takumi788 stated. so im gonna write this off as okay
Woops, meant you're catless...
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Old 07-22-2015, 01:17 PM   #7
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Woops, meant you're catless...
Careless/catless, same difference. I mean, I don't want my grandkids to be able to breathe...
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Old 07-22-2015, 05:44 PM   #8
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I do have an exhaust leak at the over pipe but not worrying about it until i install my turbo kit. just wanted to make sure this was OK. Not new materials burning off. No noticeable oil consumption As Takumi788 stated. so im gonna write this off as okay
exhaust leaks not only let exhaust gas out they often "suck" fresh air in between exhaust pulses, usually at idle and lower rpm on\off throttle
as your leak is near 02 sensors it can effect 02 reading as it sees fresh air with high 02 content so signals ecu to add fuel to engine as it thinks its lean, but your going to run rich due the unneeded fuel hence the fuel smell

log your long term fuel trims and commanded afr verses afr.
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