exhaust leak before o2 make it run rich?
#1
exhaust leak before o2 make it run rich?
i got a small header gasket leak and i cut the valve off the driver side air fitting (only one bolt for pass side) but i just crimped it closed as best as possible. my gas miliage is worse than ever and i smell gassy exhaust when idleing or coming up to a stop
#2
Re: exhaust leak before o2 make it run rich?
Yes... the leak inducts air into the exhaust, the O2 sensor "sees" the air and indicates lean, and the PCM adds more fuel, that you don't really need.
#3
Re: exhaust leak before o2 make it run rich?
ok
thats what i thought. what if the gasket leak is small like not really loud
i can fix the air pipe off the header but the gasket is new and tight as hell so dont know if i can seal it. i might have to double up the gaskets and make it two gaskets instead of one. i dont know if its a cracked header or bent flange or what
thats what i thought. what if the gasket leak is small like not really loud
i can fix the air pipe off the header but the gasket is new and tight as hell so dont know if i can seal it. i might have to double up the gaskets and make it two gaskets instead of one. i dont know if its a cracked header or bent flange or what
#4
Re: exhaust leak before o2 make it run rich?
Originally Posted by Injuneer
Yes... the leak inducts air into the exhaust, the O2 sensor "sees" the air and indicates lean, and the PCM adds more fuel, that you don't really need.
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