Diesel trucks are known for their power, reliability, and fuel efficiency, but they’re also associated with complex emissions control systems.
These systems, including the Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR) system, and Exhaust Gas Recirculation (EGR), are designed to significantly reduce emissions.
While it’s no secret that some diesel truck owners opt to “delete” or modify these systems in pursuit of better performance or easier maintenance, many choose to keep these emissions systems intact.
Here are a few key reasons why a growing number of diesel truck owners resist the temptation to delete their emissions systems:
1. Legal Issues
In the United States, removing or tampering with emissions systems is federally illegal. The Environmental Protection Agency (EPA) and some state-level regulatory bodies enforce strict emissions standards for vehicles, including heavy-duty diesel trucks.
- Legal Consequences: Deleting or modifying emissions systems violates the Clean Air Act, which governs air quality in the U.S. Tampering with emissions devices like the DPF, EGR, and SCR can result in substantial fines, penalties, prison sentences, and in some cases, seizure of the vehicle.
- State Inspections: In states with stringent emissions regulations, deleted trucks may fail annual emissions inspections. This could make it impossible to register the vehicle, potentially forcing owners to pay for costly repairs or reinstallations to make the truck street-legal again.
Keeping emissions systems intact ensures that the vehicle is compliant with both local and federal laws, which protects owners from potential legal repercussions.
2. Resale Value and Marketability
When it comes time to sell or trade in a diesel truck, the modifications made to the vehicle can have a significant impact on its resale value.
- Market Perception: Trucks with deleted emissions systems may be seen as less valuable by prospective buyers due to legal and mechanical concerns.
Many buyers prefer a vehicle that is completely unmodified—as that ensures the truck will pass any required inspections, and reduces the chances that a truck has been abused or driven hard.
- Restoration Costs: If a truck owner does decide to sell a deleted vehicle, restoring the emissions systems to their original state can be costly. Reinstalling components like the DPF, EGR, and SCR systems to bring the truck back into compliance with regulations can cost thousands of dollars.
Additionally, depending on the quality of the parts and tune files used to delete a truck, there can often be expensive maintenance issues not easily seen by the naked eye.
For example, in Cummins-powered Rams with the 68RFE, aggressive delete tuning and/or low-quality transmission tuning can quickly cause expensive failures.
By leaving emissions systems in place, owners preserve the resale value of their truck and ensure it’s more appealing to a larger pool of potential buyers.
3. Refusal to Repair by Shops and Dealerships
More and more diesel shops, as well as many dealerships, simply will not work on a diesel truck that has been deleted. From their perspective, it’s just not worth the legal risk of having an illegally modified truck in their facility.
While it’s somewhat rare for a repair facility to be fined for performing non-emissions-related work on a truck, it is an understandable precaution. Depending on where you live, this can create quite a headache when needing various parts serviced or replaced.
By keeping the emissions systems in place, owners guarantee they won’t be turned away when they need work done.
4. DOT Inspections and Commercial Vehicle Use
For diesel truck owners who have to undergo DOT inspections, disabling emissions systems can be a particularly bad idea. Despite the known failure points of these parts, it can be extremely difficult (impossible in some scenarios) to operate a DOT-inspected diesel truck that has been illegally modified.
Additionally, some areas in the United States have begun actively pursuing owners of deleted trucks via traffic cameras, roadside inspections, and more.
If you operate a diesel truck for commercial purposes, we’d recommend being very, very cautious about tampering with the federally mandated emissions systems.
Conclusion: Delete or leave it stock?
While the allure of improved performance and cost savings from deleting emissions systems is tempting for some diesel truck owners (trust us, we understand), many opt to keep their systems intact for reasons that range from legal compliance to simply avoiding headaches.
By maintaining their emissions systems, owners not only ensure legal status, but often maximize resale value while avoiding issues with finding repair facilities, passing inspections, and more.
If you’re on the fence about deleting your diesel truck—we can’t tell you what the right decision is. We completely understand why people remove emissions equipment—as well as why so many owners don’t.
This is why, among other reasons, we developed our EGR Filter Kits. These emissions-compliant kits remove 85% of the harmful particulate matter (soot) that normally circulates throughout your EGR system and engine.
Over the life of a diesel truck, this single upgrade can increase the life of expensive EGR components by 6x or more! If you have questions about FASS EGR Solutions, please give us a call at (636) 433-5410, or shoot us an email to techsupport@fassride.com.
Thanks for reading!