my exhaust smells like farts.... thoughts??? - Page 2 - MustangForums.com


2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

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Old 08-20-2009, 04:09 PM   #11
Riptide
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Normal to some extent. I've noticed it in many, many cars. Including ones that were way to new for bad cats.
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Old 08-20-2009, 04:31 PM   #12
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Quote:
Originally Posted by Derf00 View Post
You haven't thought about fouled O2 sensors. Sensors that are carbonized from running rich can cause false readings to be given to the PCM. Over time this will saturate the Cats.
you're right, i hadn't thought about that yet. is there a way, that you know of, to tell if they are bad?


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Originally Posted by sonicmetalicS197 View Post
I noticed an exhaust leak right under the cabin, where my mufflers are, so I tightened up the clips and that seemed to help alot, cut down on the smell prolly 80% but I've still smelled it like once or twice since then. So that might help, smoke your pipes just to b sure, also check your cai/airbox for leaks ... I think I need to sea foam
i haven't been able to check all exhaust connections yet, but that will probably be my next 'check'. funny thing, though, i actually just checked my cai a couple of days ago for leaks... no problems, though


also, on a side note/question... i know when you seafoam you need to suck it through a/the vacuum hose, but i've never been sure which hose is the right one (so a pic or something would be appreciated )


thanks for all the suggestions so far, too
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Old 08-20-2009, 04:57 PM   #13
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On occassion, My Stang's exhaust smells like rotten egg fart. I stopped filling up the tank with beans and now she is fine. lol J/K
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Old 08-20-2009, 05:02 PM   #14
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I wouldnt read too much into it. I gaurantee your cats are still fine. It just smells, alot of people have noticed it too. Im not sure how High flow cats will make it smell lol. I have an o/r prochamber and honestly its not all that loud. It is very tolerable.
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Old 08-20-2009, 05:15 PM   #15
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My GF was following me in her Z, I floored it and she said it was very strong smelling but she didnt say what it smelled like. I also have high flow cats so it may make some difference too.
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Old 08-20-2009, 06:44 PM   #16
miloman
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Ive never had a rotten smell from my exhaust......before or after the bassani high flow cats. I use chevron 91 all the time.
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Old 08-20-2009, 07:07 PM   #17
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Quote:
Originally Posted by Derf00 View Post
You haven't thought about fouled O2 sensors. Sensors that are carbonized from running rich can cause false readings to be given to the PCM. Over time this will saturate the Cats.
Xeno....90% of the time if the sensors are bad you will throw a code? So any codes thrown?
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Old 08-20-2009, 07:41 PM   #18
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^^ nope, no thrown codes (that's why i didn't really think about it, but i wasn't sure if you could do one of those basic diy diagnostic checks or something)
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Old 08-20-2009, 08:32 PM   #19
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Mix some 2 stroke oil into your gas. 1 ounce per 5 gallons.
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Old 08-20-2009, 10:38 PM   #20
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well maybe someone took a dump in ur pipes and u got a turd in there lol, no worries filler up with some jet fuel and burn that smell out!!
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