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      05-30-2018, 04:47 AM   #1
b21playa
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How to check for dpf

Hi all

When I purchased my 335d it smoked a bit and I did a dpf check using ista which showed 0mbar backpressure, so guess it had been coded out. Recently had a full software update which of course wold have returned the map back
To standard and now back pressure is showing a value around 9mbar in idle.

Is there anyway to easily tell if the dpf has been gutted, as itís definately not a replacement pipe?


Thanks
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      05-30-2018, 05:40 AM   #2
Adam1990
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Quote:
Originally Posted by b21playa View Post
Hi all

When I purchased my 335d it smoked a bit and I did a dpf check using ista which showed 0mbar backpressure, so guess it had been coded out. Recently had a full software update which of course wold have returned the map back
To standard and now back pressure is showing a value around 9mbar in idle.

Is there anyway to easily tell if the dpf has been gutted, as itís definately not a replacement pipe?


Thanks
I guess my first check would be to have a look and see if it looks like it has been welded back together at some point.

What sort of millage is the car? If itís higher millage then I would think it would be a higher chance it could have been gutted due to issues with it clogging up in the past.
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      05-30-2018, 02:49 PM   #3
Andy198712
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wipe your finger in the exhaust, if it comes out black.... no dpf
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      05-30-2018, 03:08 PM   #4
b21playa
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Quote:
Originally Posted by Adam1990 View Post
I guess my first check would be to have a look and see if it looks like it has been welded back together at some point.

What sort of millage is the car? If itís higher millage then I would think it would be a higher chance it could have been gutted due to issues with it clogging up in the past.

Itís got 96k on it now, changing o2 sensor hopefully in the weekend so I will see if there are any signs of welding
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      07-17-2018, 10:02 AM   #5
Mus22
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Usually removing dpf causes a strong Diesel smell which pretty much gives away that you dont have one.
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      07-17-2018, 10:04 AM   #6
rasa bmw
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above is a better way,,coz you will still get a sooty exhaust if the dpf is knackered..
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