Will a lean-state harm a cat?
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Supreme Member
Joined: May 2003
Posts: 1,995
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From: Toledo, OH
Car: 1992 Firebird
Engine: forged 357
Transmission: 700r4, 2200-2400 stall, vette servo
Axle/Gears: stock pegleg 2.73 drum (temp)
Will a lean-state harm a cat?
I am a bit lean at the moment, will it bother my cat? it's brand new, high flow. It smells like eggs out the exhaust on startup.
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Joined: Jan 2002
Posts: 1,322
Likes: 1
From: Bloomingdale,IL
Car: 91 RS
Engine: 305 Tbi (L03)
Transmission: 700r4
The biggest thing that will kill a cat is a misfire. So as long as its not so lean to cause a misfire you will be ok. While the rotton egg smell is not a common smell out the exhaust, it can be considered normal. It really depends on the air and fuel that goes into the engine.
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