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Discussion Starter · #1 ·
I've seen posts around the net for a while but no solutions. This has been happening since the car was new. A bad burning smell just after a full throttle or hard acceleration. It was intermittent when new but now it does it every time. It never does it on low to moderate accelerations.

I've taken it to the dealer several times. At first they replaced all of the radiator hoses because of a service ticket that claimed the coolant reacted badly. That was not it.

They tightened the bolts on the exhaust manifold. That was not it.

The smell even comes in when the A/C is on recirculate.

Also, it might be more noticeable on the drivers side.

Has anyone figured this out for their car?

Thanks.
 

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I've seen posts around the net for a while but no solutions. This has been happening since the car was new. A bad burning smell just after a full throttle or hard acceleration. It was intermittent when new but now it does it every time. It never does it on low to moderate accelerations.

I've taken it to the dealer several times. At first they replaced all of the radiator hoses because of a service ticket that claimed the coolant reacted badly. That was not it.

They tightened the bolts on the exhaust manifold. That was not it.

The smell even comes in when the A/C is on recirculate.

Also, it might be more noticeable on the drivers side.

Has anyone figured this out for their car?

Thanks.
Hi Atari,

I'm sorry to hear about the concerns you have with your vehicle! If you end up taking your vehicle back to the dealership let me know by sending us a PM with your VIN and contact information. I can see if there is anything I can do to assist them on my end.

Andrea
Chrysler Social Care Specialist
 

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Discussion Starter · #4 ·
If I had to guess, I would say it smells of exhaust POST cat. It's not the kind of raw exhaust smell you might get from the manifold. I've heard some people describe their problem as a rotten egg smell. I could see it being described that way too, but Post Cat exhaust is what I have always claimed.
 

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HAHAHA nice. I get the same smell from time to time after i have driven like a grandpa for awhile. Nothing to be worried about like what has been said sounds like carbon is all.
 

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It's really funny you mention that. I have been driving like Ms. Daisy. Most of the speed limits around here are 25mph. I get to open it up once/week at most.
hahaha hey sound like me I have a 300c 5.7l hemi , but I really never open it up on roads. maybe 3 times and now I'm getting the crazy smell of build up too . I'm going to look into see about pvc
 

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I have a 2012 300c and I am getting the same thing. But I drive my car like a mad man all day basically. Guess I can look into changing the pcv valve. Good luck
175347
 

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I have a 2014 300C w/5.7L. I run mostly highway everyday & I go WOT quite often. Recently, anytime I get above 3500-3800rpm while on the on ramp getting up to speed that carbon/egg smell just engulfs the can.
I run Amsoil Signature 5w/20 only. Amsoil P.I Fuel Treatment every 4k miles. She's had nothing but Amsoil since day One @ 106 miles. Just rolled over 100k miles. PCV rattles & works properly. My top end is sparkling clean, throttle body, intake & exhaust valves, everything.
Could my CATs be getting plugged ? She still has plenty of power & even with a constant heavy foot I'm getting 20.5 - 21mpg
 

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Hi this may or may not help us just putting this out for thought. To be honest in my opinion, I really think it could be in the gas we all using since 2020 I have noticed this same smell coming from mostly all the vehicles on the road now days , especially on the highway or even after everyone is waiting at a read light and we all take off. I really believe it's something in how American gas we use daily ...
 

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I've seen posts around the net for a while but no solutions. This has been happening since the car was new. A bad burning smell just after a full throttle or hard acceleration. It was intermittent when new but now it does it every time. It never does it on low to moderate accelerations.

I've taken it to the dealer several times. At first they replaced all of the radiator hoses because of a service ticket that claimed the coolant reacted badly. That was not it.

They tightened the bolts on the exhaust manifold. That was not it.

The smell even comes in when the A/C is on recirculate.

Also, it might be more noticeable on the drivers side.

Has anyone figured this out for their car?

Thanks.
 

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I've seen posts around the net for a while but no solutions. This has been happening since the car was new. A bad burning smell just after a full throttle or hard acceleration. It was intermittent when new but now it does it every time. It never does it on low to moderate accelerations.

I've taken it to the dealer several times. At first they replaced all of the radiator hoses because of a service ticket that claimed the coolant reacted badly. That was not it.

They tightened the bolts on the exhaust manifold. That was not it.

The smell even comes in when the A/C is on recirculate.

Also, it might be more noticeable on the drivers side.

Has anyone figured this out for their car?

Thanks.
Found my wife's 2013 300s with same burning smell on heavy acceleration. Also found her a/c runs at all times whether turned on or not. Always cold air coming out vents even with a/c off and fan on. Pulled a/c clutch fuse, now normal air comes out vents when fan turned on, AND no more burning smell on heavy acceleration. Now I pull fuse in winter, more wot...put fuse in during summer, less wot.
 

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Gents I found the problem for the WOT bad smell on my car at least. It was the cabin exhaust vents in the rear bumper. I thought my cats were plugged or something but all it was was a $50 dollar fix that took only a few minutes. It was more work to take the tires off then it was to replace them. Just remove the back tire and pop out some of the push pins for the fender and pull it back like in the picture. I used a bungee to secure to door handle so it would stay out the way. Get under there and pop out the old and snap in new one. Mine had zero flaps left on them so was definitely an issue. But since changing them I have not smelled anything. So glad it was a cheap easy fix. I included a picture of the ebay ones I ordered and they were perfect. Hope this helps others.

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