# Rotten egg smell.. **URL:** \ **Category:** SON240sx Automotive\ **Created:** [September 15, 2006, 6:48pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944 "2006-09-15T18:48:49Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [September 15, 2006, 6:48pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/1 "2006-09-15T18:48:49Z")
My car smells like rotton eggs out of the exhust tonite…it also drop kinda low in RPM to about 400 then goes back up again…does anyone know what this could be? ---
**Author:** ![sidewayz240](https://avatars.discourse-cdn.com/v4/letter/s/e99b99/32.png) [@sidewayz240](https://forums.speedlife.net/u/sidewayz240)\ **Post date:** [September 15, 2006, 8:59pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/2 "2006-09-15T20:59:44Z")
Bad gasoline possibly ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [September 15, 2006, 9:03pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/3 "2006-09-15T21:03:25Z")
rotton eggs could mean clutch ---
**Author:** ![scribbles](https://avatars.discourse-cdn.com/v4/letter/s/bb73d2/32.png) [@scribbles](https://forums.speedlife.net/u/scribbles)\ **Post date:** [September 16, 2006, 12:17am UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/4 "2006-09-16T00:17:53Z")
clutch is more of a sickly sweet smell. ---
**Author:** ![Theo23](https://avatars.discourse-cdn.com/v4/letter/t/43a26b/32.png) [@Theo23](https://forums.speedlife.net/u/Theo23)\ **Post date:** [September 16, 2006, 1:41am UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/5 "2006-09-16T01:41:58Z")
rotten eggs = cat not working. ---
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [September 16, 2006, 6:47am UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/6 "2006-09-16T06:47:17Z")
I put in sonoco like i always have 2 nights ago …and it cant be clutch really casue its automatic lol…and my dad says its cat too but i dunno becasue i jsut bought a new one at the begining of summer… ---
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [September 16, 2006, 6:49am UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/7 "2006-09-16T06:49:03Z")
Oh and it only does it sometimes other times it is running fine. ---
**Author:** ![Lith](https://avatars.discourse-cdn.com/v4/letter/l/fbc32d/32.png) [@Lith](https://forums.speedlife.net/u/Lith)\ **Post date:** [September 16, 2006, 7:03am UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/8 "2006-09-16T07:03:10Z")
I agree with Theo… rotten egg smell is a bad cat… ---
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [September 16, 2006, 8:53am UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/9 "2006-09-16T08:53:08Z")
Alright jsut got back from the garage they did a test…it IS the cat lol…i guess i thought it wasent becuse it just got put in brand new this summer…so tomarow they are going to do a test becasue something is causeing the cat to go bad…i guess something wrong in the engine to make it do that…any ideas? ---
**Author:** ![240coupe](https://avatars.discourse-cdn.com/v4/letter/2/e495f1/32.png) [@240coupe](https://forums.speedlife.net/u/240coupe)\ **Post date:** [September 16, 2006, 3:59pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/10 "2006-09-16T15:59:22Z")
so if you dont run a cat your exhaust will smell lik rotten eggs? ---
**Author:** ![snowboard\_240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/snowboard_240sx/32/5519_2.png) [@snowboard\_240sx](https://forums.speedlife.net/u/snowboard_240sx)\ **Post date:** [September 16, 2006, 4:03pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/11 "2006-09-16T16:03:54Z")
just run a hollowed out cat and have a good cat for when u need to do e test’s…i put a new cat, magnaflow, and it blew out after two months of use i ran a hollowed outn cat for 10 months…never bothered by any cops or anything ---
**Author:** ![GT1](https://avatars.discourse-cdn.com/v4/letter/g/b5e925/32.png) [@GT1](https://forums.speedlife.net/u/GT1)\ **Post date:** [September 16, 2006, 4:25pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/12 "2006-09-16T16:25:43Z")
stop farting in the car. GT ---
**Author:** ![rix240sx](https://avatars.discourse-cdn.com/v4/letter/r/e56c9b/32.png) [@rix240sx](https://forums.speedlife.net/u/rix240sx)\ **Post date:** [September 17, 2006, 8:45pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/13 "2006-09-17T20:45:25Z")
let us know the test results on the car see what happend ---
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [September 18, 2006, 6:28pm UTC](https://forums.speedlife.net/t/rotten-egg-smell/99944/14 "2006-09-18T18:28:47Z")
They put my stock cat back on today and now car runs fine again but alot quiteer now… ☹ oh well next year ill be gettibng a whole new system so whatever…and they never di any test…i guess it was fine…? lol