Did the DPF delete, now getting exhaust fumes - Diesel Forum - TheDieselStop.com
6.7L Upgrades and Aftermarket - Engine Upgrading or adding OEM or aftermarket equipment to your 2011-Up Super Duty truck with 6.7L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 6.7L Power Stroke engine.

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post #1 of 8 (permalink) Old 11-13-2019, 03:46 PM Thread Starter
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Did the DPF delete, now getting exhaust fumes

Hello All,

My truck is 2014 F250 Powerstroke 6.7, I just did the DPF delete, turned off the EGR, and have the Mini Maxx Tuner now. But Im noticing exhaust fumes inside the truck now. Its mainly when sitting in traffic stopped. While moving I don't notice it as much. Has anyone else experienced this? Thanks! JB
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post #2 of 8 (permalink) Old 11-14-2019, 11:30 AM
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You have a exhaust leak
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post #3 of 8 (permalink) Old 11-15-2019, 08:38 AM
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Turn off the climate control. Does the exhaust smell still exist??? If so you might have been getting a "false positive" as the fumes were moving back to front entering the cowl area and getting into the truck.
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post #4 of 8 (permalink) Old 11-15-2019, 09:09 AM
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As Heavy said, turn off your ac/heat. Ford's nominal operation of the HVAC is to bring in outside air unless you turn it off. But, turning it off is not permanent as the HVAC might override the setting on certain conditions and it is also reset to outside air each time you turn off the key and restart the vehicle.
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post #5 of 8 (permalink) Old 11-15-2019, 10:18 AM
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My truck doesn't smell when it's stopped and the AC is on.
So the remedy is turn off the HVAC system if you are going to stop at a stop light.
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post #6 of 8 (permalink) Unread Today, 12:09 PM
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So the consensus is that the system has always drawn in exhaust, but now with a delete, and the exhaust stinks, you now smell it. Guess that answers why mine smells on occasion and the system is tight front to back.
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My suggestion was a test to see if there really was a "leak". Second suggestion then becomes getting under the hood to check the physical connections that may have been touched or that could lead to a exhaust leak. The biggest sign would be the physical collection of soot or some other indicator at the connection points.

Most often when people are driving they are not realizing the climate control systems pull in outside air. There are mode settings that prevent this specifically the RECIRC selection. Or you can just shut off the climate control system. Set the climate control ON, then select RECIRC. This will stop "outside air" from being used.

Get behind a big rig dragging a brake, or another vehicle leaking coolant it will cause panic attacks. People then spend hours investigating for something that doesn't really exist.

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post #8 of 8 (permalink) Unread Today, 12:36 PM
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Yeah, or some one pulls out in front of you on the highway and floors it, then you get to enjoy the pungent aroma of uncatalyzed exhaust fumes. YUCK. If the wind is just right, it will blow the fumes forward, and get pulled in, which is what happens with mine. I used to enjoy the smell of diesel exhaust, when I drove 18's back in 88, but today, the smell irritates my throat and sinus. My Kubota burns cleaner.

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