Exhaust smell sport mode

[Wtarter]

When in sport mode and accelerate hard smell exhaust in cabin

 

[allmyEXes]

I think there is a recall notice on that issue...

 

[peterk9]

When in sport mode and accelerate hard smell exhaust in cabin

Are you sure it's an exhaust smell or a 'rotten egg' (sulphur) type smell which is sometimes common when you suddenly accelerate hard. It usually dissipates in a few minutes.

Peter

 

[Wtarter]

Are you sure it's an exhaust smell or a 'rotten egg' (sulphur) type smell which is sometimes common when you suddenly accelerate hard. It usually dissipates in a few minutes.

Peter

Not the rotten egg sulfur smell alot less potent

 

[steweod]

giver the ole italian tune up and see it it goes away.

 

[Wtarter]

giver the ole italian tune up and see it it goes away.

Ive been driving her more aggressive and more in sport mode to run cleanup/burn all the crap through. Ill report back soon to let everyone know if it diminshes. Thanks

 

[Pedro504]

Last night, after the Bills game, on the way home from my daughters the Explorer had the awful rotten egg smell that you could smell in the cabin.
Drove home in Slippery mode at speeds under 35mph due to the snowy road conditions. The smell was so extremenly strong throughout the short journey that once home I had to run a 20" box fan on high in the garage for 10 minutes with the doors open to clear the air.
Prior to the drive home the vehicle sat outside for 6 hours at about 8 degrees. I started the engine 5 minutes before we left and the drive home was about 5 miles. I could smell the odor as soon as I walked up to get inside. I only use Sunoco Top Tier premium 93 octane fuel in the Explorer and the tank was 3/4 full. There was no smell on the trip to their house but the vehicle was parked for 2 days in an attached garage at about 40 degrees.
I've noticed the smell a few times before but never to this extreme. The vehicle is 4 months old and has 2,400 miles. It's never been driven hard.
Is this a cold weather/short drive distance anomaly or was the Explorer feeling the pain of the Bills loss to Chiefs?
Should I add a can of Sea Foam in the tank to clear things out? Any other recommendations?

 

[steweod]

Last night, after the Bills game, on the way home from my daughters the Explorer had the awful rotten egg smell that you could smell in the cabin.
Drove home in Slippery mode at speeds under 35mph due to the snowy road conditions. The smell was so extremenly strong throughout the short journey that once home I had to run a 20" box fan on high in the garage for 10 minutes with the doors open to clear the air.
Prior to the drive home the vehicle sat outside for 6 hours at about 8 degrees. I started the engine 5 minutes before we left and the drive home was about 5 miles. I could smell the odor as soon as I walked up to get inside. I only use Top Tier premium 93 octane fuel in the Explorer and the tank was 3/4 full. There was no smell on the trip to their house but the vehicle was parked for 2 days in an attached garage at about 40 degrees.
I've noticed the smell a few times before but never to this extreme. The vehicle is 4 months old and has 2,400 miles. It's never been driven hard.
Is this a cold weather/short drive distance anomaly or was the Explorer feeling the pain of the Bills loss to Chiefs?
Should I add a can of Sea Foam in the tank to clear things out? Any other recommendations?

From my experience these turbo engines need to be run. They start to back up and you will get that smell. I am assuming you are running it pretty gentle since you are in slippery mode. One thing to remember is I think in slippery mode it really retards the throttle response. Basically it doesn't open the throttle the same rate as it would in normal. This added with quicker up shifts could be adding to the smell issue. Sometimes people program ECUs on turbo engines to run a little rich right before the boost kicks in so you do not end up in a lean mixture since there is a delay for your 02s to make corrections after boost kicks in. If this is the fact for the factory tune and say rich point is timed at the same time it is up shifting in slippery mode you could just be loading up the engine. This paired with short trips in a cold environment the CATs may not be getting hot enough to burn everything off all the way.

Now that I wrote this all out I wonder if these CATs rely on the turbos to help heat the exhaust pipes to get the CATs up to temp to work properly? This could explain some of these smell issues....

 

[peterk9]

I do many short trips of 5 - 15 minutes in my Aviator and lately the temps have been around -18 F. No smell. Sometimes use the remote start to let it run 5 minutes or so. No smell. Have used Snow mode a few times and no smell. All the preceding also applied to my 2017 Platinum. The fact that Pedro could detect the smell before he got in the idling vehicle should eliminate using "slippery" mode. Run top tier 91 octane.

Peter

 

[peterk9]

Update: Wouldn't you know it. I remote started my Aviator this morning when it was in the garage with the door open. I was not able to get to it within the usual 5 minutes and it shut down. As I approached the garage I could detect the sulphur smell. It was even stronger in the garage. I got in and backed out and noticed that there was no smell inside the cabin. This is the first such incident I have encountered but also the first time the vehicle ran long enough to turn off.

Peter

 

[Pedro504]

Today I drove the Explorer about 5 miles after it had been in the garage overnight. The sulfur smell was not present at startup or in the cabin however upon returning home, turning off the engine and exiting the vehicle I could smell sulfur outside. Air temperature is 20 degrees (f) today and my driving was in the default Normal mode with a max speed of 45 mph.
Guess driving the Explorer in cold weather is another reason to mask-up (LOL)!

 

[Wtarter]

Today I drove the Explorer about 5 miles after it had been in the garage overnight. The sulfur smell was not present at startup or in the cabin however upon returning home, turning off the engine and exiting the vehicle I could smell sulfur outside. Air temperature is 20 degrees (f) today and my driving was in the default Normal mode with a max speed of 45 mph.
Guess driving the Explorer in cold weather is another reason to mask-up (LOL)!

Beat that truck up to heat the cats and break it in right. Id say gas but using sunoco should be. Try switching to mobil exxon and bp to see if theres a difference. Ive had extensive experience with this even lemoned a Toyota 4runner and ford sportrack for it after the exhaust was replaced. Toyota asked at deposition how far have you driven. I told the lawyer here to this deposition. 3 way cats need to be driven alot to breakin supposedly.

 

[steweod]

Just throwing this out there. Another thought I had is, you need exhaust heat to geat the CATs to operating temp. However your turbos are pre CATs in alignment so they are going to suck up a lot of your exhaust temps before your CATs get them.

We make a lot of short trips now, but I still find time and places to get to "spirited" driving/accelerations in to really exercise the engine... so to speak.

 

[steweod]

When in sport mode and accelerate hard smell exhaust in cabin

Oh... make sure your windows are rolled up.. I had a kid leave one just barely open.. that let in some odd smells... haha