Newb question about def delete
Laughing Gas
Joined: Jul 2017
Posts: 1,203
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Entirely depends on the place. I've listened to podcasts where the EPA has told shops they can service and work on a vehicle that has been altered, but if they have to work on the altered system they have to replace it with the emissions compliant parts again. If you're hoping to have something done under warranty - good luck.
Lead Driver
Joined: Nov 2005
Posts: 8,459
Likes: 4,955
They have no base to work from on a tuned truck, anything they might do would just screw up the aftermarket tuning.
Super Moderator
Joined: Aug 2008
Posts: 37,375
Likes: 1,861
From: Frederick, MD
If you delete the DEF you also have to delete the DPF.
If you delete you need to have the tuner, tunes and the stock tune. You also need to keep all the parts so they can be put back on upon selling the truck or when the tunes no longer work right.
If you delete you need to have the tuner, tunes and the stock tune. You also need to keep all the parts so they can be put back on upon selling the truck or when the tunes no longer work right.
Cross-Country
Joined: Mar 2021
Posts: 85
Likes: 38
From: PNW
Never had service denied, my truck has been deleted for 80k miles. The dealer has never even mentioned it when I picked it up.
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Logistics Pro
Joined: Jan 2010
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That said I'd say it is a good idea to do both at the same time...but I don't think it's truly necessary.
Lead Driver
Joined: Nov 2005
Posts: 8,459
Likes: 4,955
It would be possible to do a DEF/SCR only delete and tune, but the tune would have to keep the DPF regeneration working.
It would also have to make the EGR system work way more than it would with the DEF/SCR system.
Fuel economy and power would be in the toilet with such a tune.
So, I've never seen anyone do this, no good reason to do anything less than a full delete.
But, IMO, no good reason to do a delete at all with a proper operating full emission system.
It would also have to make the EGR system work way more than it would with the DEF/SCR system.
Fuel economy and power would be in the toilet with such a tune.
So, I've never seen anyone do this, no good reason to do anything less than a full delete.
But, IMO, no good reason to do a delete at all with a proper operating full emission system.
Cargo Master
Joined: Jul 2017
Posts: 2,297
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do you have the obd2 plugged so they cant do any updates?
Cargo Master
Joined: Oct 2019
Posts: 2,830
Likes: 1,187
From: Southeast MO
It would be possible to do a DEF/SCR only delete and tune, but the tune would have to keep the DPF regeneration working.
It would also have to make the EGR system work way more than it would with the DEF/SCR system.
Fuel economy and power would be in the toilet with such a tune.
So, I've never seen anyone do this, no good reason to do anything less than a full delete.
But, IMO, no good reason to do a delete at all with a proper operating full emission system.
It would also have to make the EGR system work way more than it would with the DEF/SCR system.
Fuel economy and power would be in the toilet with such a tune.
So, I've never seen anyone do this, no good reason to do anything less than a full delete.
But, IMO, no good reason to do a delete at all with a proper operating full emission system.
Lead Driver
Joined: Nov 2005
Posts: 8,459
Likes: 4,955
SCR and DPF are not separable. The EGR is the #1 reason to delete. The intake gets so choked up with soot it's ridiculous. VW takes their EGR gas post DPF in order to avoid this. Probably not practical in an application like our trucks but it's a great idea. From the trucks I've seen with 200k miles or more the intakes are reduced by at least 50% with soot.
Current trucks use so little EGR now, one reason why new trucks use so much DEF, so that they can use less EGR.
They always claimed on the Cummins that EGR would kill the engine, but my 2015 RAM Cummins still had a fully operating ORIGINAL EGR, that had never been cleaned or off the truck in over 614K miles.
The SCR can be done away with, but would take considerable work.
I'm sure the OP, who hasn't been back to comment further on this thread, has no real idea what is involved in any type of emissions delete or tuning, he's just heard lots of talk about it.
