Yes, several possibilities come to mind.

What is the car’s year model and mileage?

 

2014 RT Shaker 135,000 miles

 

 

Depending on the year of your car there was an EVAP. On my challenger I used to notice all kinds of smells like gas, burnt clutch only to discover the body seal that gives access to the primary fuel pump hat (under the rear seat on the driver side) was popped off.

 

The EVAP canister recall should be easy to rule out. Check unperformed recalls on the car using Dodge’s recall website and the car’s VIN. (Also, if this is responsible for the gasoline odor, it usually only happens after filling up the gas tank. Once the fuel level reaches 2/3 full, the odor will not be as prominent until the next time it is filled full again).

The next item on the list to check would be both the fuel pump gasket/rings under the back seat bottoms. One or both has a tendency over time to flatten out and lose their ability to seal their corresponding hole in the fuel tank from the cabin air.

Is the odor intermittent that follows the fuel level, or is it constant no matter what the fuel level is?

If you remove the back seat (lower) does the odor strength increase or remain the same?

Is the odor more easily detected while sitting still, or can it be detected easily at highway speeds just as it can idling?

 

I’ll take note of the fuel level next time I smell it…I have a feeling, it popping up after fill-ups..

 

I have read many posts of fuel odor after a fill up. Some found the top of a fuel pump cracked, more like a hair line fracture, some will brown at the connector from the resistance heat and get brittle.
Lots of the victims report they always keep trying to fill it up more after the first auto-stop of the nozzle.

Those pump tops are tightened down pretty firmly on the o-ring via a twist locking ring. I replaced mine in my 2013 with the SRT pump supplied with my blower.

If you should wind up with a new pump it will come with a pig tail connector and instructions on wiring it back up. If you just plug your OE in it will not run.

 

Ok…haven’t found the cause for the gasoline smell…but I narrowed down when the smell usually comes on…
After driving any distance…long or short…if I get out of car….stay out for 15-30 minutes…then get back in it…and drive….that’s when I smell the gasoline odor….as soon as I take off…the odor stays usually until I stop again. It’s getting bad too.
Does this give anybody any clues?
I’d like to have some ideas before taking to mechanic.

 

Make sure the car isn't subject to the EVAP recall: Lookup FCA Vehicle Recalls by VIN | Official Mopar® Site

If it is, that's likely your culprit. The results of that VIN search will tell you if it is, and if so, you can have it fixed at any local Dodge dealership, for free.

If the car is not subject to the EVAP recall, or it was but the recall's been performed already, my next suspect would be one or both of the rubber O-rings sealing the fuel pump assemblies in the top of the fuel tank. They are inside the car (beneath the rear seat bottoms), so a poor seal on either will allow gasoline fumes into the cabin.

Pull the rear seat bottom(s) up far enough to physically see the top of each fuel pump assembly. If the odor of gasoline suddenly gets stronger, the one you're looking at is likely your culprit.

Those would be my top 2 suspects for the source of the gasoline smell inside the cabin...

 

“Pull the rear seat bottom(s) up far enough to physically see the top of each fuel pump”….??

Do I have to unbolt something in order to pull up the seat?…not real sure what you mean..

 

IIRC the seat bottoms in the Challengers are just snapped into the floor pan with a large metal clip/spring. So you should just be able to grasp the seat bottom/cushion and quickly pull upward to unsnap it from its locked position.

It's been a few years since I had to do that in a Challenger, but I believe that's how it was done with them....

 

A Guy

 

Thx….now the big question….how easy is it to put back in???

 

Picture one of those big coast-size igloo coolers, the kind you’d take on a trip to the beach that requires a person on each side to carry because it’s so big.

Now envision gaining entry to the stuff inside - you would grasp the front of the lid and pry upward with enough force to pop the little plastic nipple on the lid out of its notch on the cooler wall.

And now envision closing it back up after filling it full of ice. You want to make sure the lid is nice and tight so the ice doesn’t melt, so you firmly press the lid down until you hear the plastic tab on the lid snap back into its slot, locking the lid in the closed position.

That’s a good analog of what you would do to see what’s under each rear seat bottom. You’ll use the same amount of force to both lift up the seat cushion (opening the lid) and put it back in its place (closing the lid), and you’ll be using the same pulling/pushing motions, more or less - pry up and push back down, with enough authority both ways to snap the metal tab into or out of its normal resting spot.

It’s much easier than all this sounds. Once you figure it out, you’ll see what I’m talking about and wonder what all the hub-bub was about to begin with…

 

Just the reverse

A Guy

 

Thx….by the way, you forgot the part about filling it with a case of Lone Star Longnecks…

 

I’d rather eat a hand-full of west Texas dirt than drink another Lone Star beer. I had my fill of that swill back in college, and I shan’t be reliving those days any time soon!

 

On of the few proper uses of shan't on this forum I am aware of

A Guy

 

Lol and if you do a search it seems like Nuke's username pops up more often then would have expected. At least it was shan't instead of shalln't.

shalln't - Wiktionary

en.wiktionary.org

 

or sharted.

 

Shane...shan't...hmmm

A Guy

 

That would describe Shane's disdain for Lone Star beer to a "t".

 

Haven’t taken this in yet, but discovered something today. I started smelling the “gasoline-like” odor again today. Once again, it was getting back in the car 15-20 minutes after it had been driven. I turned off the AC/Heater fan and the smell went away. So…I looks like the smell only occurs if the fan is on…and after driving the car after a previous drive…Weird..

 

I know this is a long thread, but I'll just respond to this last comment. Let's say you never use the fan, do you smell gas? Probably not.
The air intake for the interior fan is on the upper cowl area of the passenger's side of the engine compartment. It can suck any smell from the engine bay into the interior of the car. So, I'm thinking the gas smell is in your engine bay somewhere. See my picture for the location of the filter lid. Has the cabinet filter ever been changed? My other though was, I had a loose hose on my oil catch can once. It was a funky odor, but definitely not like gas, but if you have a catch can, you might want to check the hoses out.

 

My 2018 Dodge Charger SXT Plus started smelling like gas so bad we would get headaches and have to roll the windows down. The smell was coming from the rear passenger wheel well. We popped off the rear seat and found that the access door to the fuel pump had completely cracked all the way around its edge on the passenger side. The drivers side appeared to be fine. Replacement from the dealership was like $32.00.

 

Thanks for replying, and welcome aboard here!
You can't beat a $32 fix.