Car smells really bad! Like rotten eggs or sulfur. - Mustang Evolution

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Old 07-12-2013, 11:19 PM   #1
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Car smells really bad! Like rotten eggs or sulfur.

Hey everyone. Please help me out! So today after I got off from work and turned on my car I noticed that it began smelling really bad. It smelled like rotten eggs or like sulfur it smelt really bad and was really strong that it felt like my nostrils were burning. On my way home the car constantly smelled bad and some of the smell was going into the cabin. When I got home it still smelled bad. I dont know why it smells like this. Does anybody have this problem too? I have a 2011 Mustang V6 With a Steeda CAI and a 91 octane hybrid tune. I'm currently running on 92 octane since its the highest I can find in my city.

---------- Post added at 08:19 PM ---------- Previous post was at 08:19 PM ----------

Any help will help. Thank you in advance.
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Old 07-12-2013, 11:35 PM   #2
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Why aren't you running a 91 tune on 91 octane instead of a 91 tune and 92 octane?
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Old 07-12-2013, 11:39 PM   #3
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Originally Posted by BryanGTR169 View Post
Hey everyone. Please help me out! So today after I got off from work and turned on my car I noticed that it began smelling really bad. It smelled like rotten eggs or like sulfur it smelt really bad and was really strong that it felt like my nostrils were burning. On my way home the car constantly smelled bad and some of the smell was going into the cabin. When I got home it still smelled bad. I dont know why it smells like this. Does anybody have this problem too? I have a 2011 Mustang V6 With a Steeda CAI and a 91 octane hybrid tune. I'm currently running on 92 octane since its the highest I can find in my city.

---------- Post added at 08:19 PM ---------- Previous post was at 08:19 PM ----------

Any help will help. Thank you in advance.
Do you have the dopest grabber vert in the world!
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Old 07-12-2013, 11:42 PM   #4
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I had that problem when my cat went bad. Went offload hpipe smell disappeared
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Old 07-12-2013, 11:47 PM   #5
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Why aren't you running a 91 tune on 91 octane instead of a 91 tune and 92 octane?
Well I called American Muscle and asked them if I could use a 92 octane on a 91 hybrid tune. They said it was completely safe as long as I don't go lower than 91. So I've been using it for about a month. I fill her up at chevron which offers 92 octane. I know the higher the octane the better the performance so I've been using it. Should I just go back to using the 91 octane? I filled her up last week and that was my fourth time filling it up with 92. The bad smell started today.

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I had that problem when my cat went bad. Went offload hpipe smell disappeared
Ah really? I still have my stock exhaust.

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I had that problem when my cat went bad. Went offload hpipe smell disappeared
I was thinking about buying the Borla atak in about three months or so.

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Old 07-13-2013, 11:16 AM   #6
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Could the smell be coming from my battery? I just tried to turn on the car to see if it still smelled and the battery appeared to be dead. Could this be the reason for the awful smell?
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Old 07-13-2013, 11:58 AM   #7
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So the smell was only around when you turned on the car?
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Old 07-13-2013, 12:09 PM   #8
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Yes, It could be the battery

If your battery is now dead it may have been overcharging and burning up. You need to get the system checked out.

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Old 07-13-2013, 06:00 PM   #9
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So the smell was only around when you turned on the car?
Well after I jump started it it smelled up until I got home.
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Old 07-13-2013, 06:03 PM   #10
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Well after I jump started it it smelled up until I got home.
I would definitly check the cats
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Old 07-13-2013, 06:04 PM   #11
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If your battery is now dead it may have been overcharging and burning up. You need to get the system checked out.

Ronnie
I've been having problems with the battery for the past week or so it's been dying on me and it would take a long time for my car to crank up. I'm getting it checked on Monday and will be getting a new battery. Hopefully that solves the problem.

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I would definitly check the cats
I hope it's not the Cats! That would be an expensive fix right?
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Old 07-13-2013, 06:10 PM   #12
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If thats the problem it would be cheaper to just get a mid pipe with or without cats
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Old 07-13-2013, 06:53 PM   #13
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If thats the problem it would be cheaper to just get a mid pipe with or without cats
Agreed! The perfect time to get my full exhaust system.
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Old 07-13-2013, 10:16 PM   #14
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Originally Posted by BryanGTR169 View Post

I've been having problems with the battery for the past week or so it's been dying on me and it would take a long time for my car to crank up. I'm getting it checked on Monday and will be getting a new battery. Hopefully that solves the problem.

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I hope it's not the Cats! That would be an expensive fix right?
The cats are covered under the emissions warranty
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Old 07-13-2013, 10:19 PM   #15
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Agreed! The perfect time to get my full exhaust system.
But you could have a hole in the muffler like I did.. And I hope your not an environmentalist because if you can, yank those cats off!
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Old 07-13-2013, 11:34 PM   #16
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Have you changed the cabin filter since you bought it?
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Old 07-14-2013, 03:12 AM   #17
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Dude roll down the window when you rip one next time.....


Lol Jk hopefully you find a solution to it my man
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Old 07-14-2013, 07:38 AM   #18
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Sulfuric acid smells like rotten eggs (Battery)

The OP has been having trouble with the battery. I'm hoping he will go to someplace reliable to get the whole charging system checked out. The battery may have a cell shorting out or it actually could be the voltage regulator having a problem and overcharged the battery causing it to burn up.

I'm pretty sure it is not a catalytic converter or exhaust leak. It is a Battery or A charging system problem.

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Old 07-14-2013, 07:43 AM   #19
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Originally Posted by ronnie948 View Post
The OP has been having trouble with the battery. I'm hoping he will go to someplace reliable to get the whole charging system checked out. The battery may have a cell shorting out or it actually could be the voltage regulator having a problem and overcharged the battery causing it to burn up.

I'm pretty sure it is not a catalytic converter or exhaust leak. It is a Battery or A charging system problem.

Ronnie
That can also make a sulfur smell.

I agree if you replace the battery and if that doesn't solve it then you'd know it's not that but start with the obvious
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Old 07-14-2013, 08:00 AM   #20
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Go to get it checked out first

If there is a problem in the charging system , You don't want to burn up a new battery. Get the car checked out first. Most places that sell batteries will be able to check out the charging system unless you go to Walmart or someplace like K-Mart. Personally I myself would just go to the Ford dealer and get it done. I know it costs more but I also know it would be checked out properly and warrantied.

Just throwing in a new battery and not knowing why the first one burnt up would be kind of foolish.

Been there --done that

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Old 07-14-2013, 10:04 AM   #21
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I was having issues with my battery to. It would take a while to crank up and sometimes it would just start right up. I went to autozone had them test my battery it said it was 100% charge but there was a bad cell got a new battery the next day haven't had any issues since.
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Old 07-14-2013, 02:16 PM   #22
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Cool, I'm happy you got it fixed.



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Old 07-16-2013, 12:07 AM   #23
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Have you changed the cabin filter since you bought it?
Yup!

---------- Post added at 09:02 PM ---------- Previous post was at 09:01 PM ----------

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Dude roll down the window when you rip one next time.....

Lol Jk hopefully you find a solution to it my man
Lol! Good one man! Had me laughing! Haha I did find the solution. Thank god it was only my bad battery. I bought a new one and now my car is good as new.

---------- Post added at 09:06 PM ---------- Previous post was at 09:02 PM ----------

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If there is a problem in the charging system , You don't want to burn up a new battery. Get the car checked out first. Most places that sell batteries will be able to check out the charging system unless you go to Walmart or someplace like K-Mart. Personally I myself would just go to the Ford dealer and get it done. I know it costs more but I also know it would be checked out properly and warrantied.

Just throwing in a new battery and not knowing why the first one burnt up would be kind of foolish.

Been there --done that

Ronnie
Just got a new battery installed earlier today and thankfully I actually work at a Ford dealership so my buddy checked out my charging system for free. I just had a bad battery. It was the original battery the car came with when I bought it brand new. So I guess it was time for a new one. Thank you all of you who helped me out and gave me advice your all the best! Now I can go back to enjoying driving America's favorite muscle car! Go Mustangs!!

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I was having issues with my battery to. It would take a while to crank up and sometimes it would just start right up. I went to autozone had them test my battery it said it was 100% charge but there was a bad cell got a new battery the next day haven't had any issues since.
I had the same problem here. Now my car starts right up.
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Old 07-16-2013, 06:20 AM   #24
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Yup!

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Lol! Good one man! Had me laughing! Haha I did find the solution. Thank god it was only my bad battery. I bought a new one and now my car is good as new.

---------- Post added at 09:06 PM ---------- Previous post was at 09:02 PM ----------



Just got a new battery installed earlier today and thankfully I actually work at a Ford dealership so my buddy checked out my charging system for free. I just had a bad battery. It was the original battery the car came with when I bought it brand new. So I guess it was time for a new one. Thank you all of you who helped me out and gave me advice your all the best! Now I can go back to enjoying driving America's favorite muscle car! Go Mustangs!!

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I had the same problem here. Now my car starts right up.
Glad you figured it out and it was something simple
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Old 07-16-2013, 06:39 AM   #25
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Been following this post. Wise folks such as Ronnie make this site a good choice to get logical answers. Whenever there's a charging issue, i.e. a dead battery, have the complete charging system checked out. Rotten egg type smell can be an overcharged battery, or an exhaust issue, or even a dead critter that crawled up into the engine compartment.

Tossing parts at it is expensive. Most repair centers these days do a free check on systems, such as charging, AC, and others. As consumers, we are foolish not to take advantage of it. Sure saves in money spent tossing parts at something. Sooner or later you fix it, but at a much higher cost.
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