DPF Guys Blog
INDUSTRY News, Updates, AND Tips from the DPF Guys
The FMCSA Is Eliminating ELD Requirements. Truth or Yet Another Trucker Fantasy?
For a moment, it sounds real. That is the point.Something pops up on Facebook.A loud graphic.ALL CAPS ON A RED BACKGROUND.The claim is simple and explosive. FMCSA is eliminating ELD requirements. Then the echo chamber kicks in. “My neighbor’s friend’s uncle works for...
Before You Change Anything on Your Fleet’s Trucks, Understand What the Latest EPA News from the Wall Street Journal Actually Means for Your Business
Before You Change Anything on Your Fleet’s Trucks Understand What the Latest EPA News from the Wall Street Journal Actually Means for Your Business And what it very clearly does NOT mean Published February 10, 2026Over the past few days, a Wall Street Journal report...
The Hidden Chemistry of Diesel Combustion, From Dodecane to the Tailpipe
How microsecond combustion creates unfinished chemistry and how modern diesel systems finish the job. Most explanations of diesel engines begin and end with the bang. Air goes in. Fuel goes in. Pressure rises. Power comes out. That explanation is not wrong. It is...
A Freight Market Shakeup Is Coming
The trucking industry is entering one of those periods when the surface looks calm but the undercurrents are already moving with force. Spot rates stay flat. Operators leave the market in small numbers. Freight volumes drag through another slow quarter. Enforcement...
Diesel Deletes Are a Ticking Time Bomb: The Truth No One Told You
Diesel emissions systems have been a hot topic for truckers and fleet owners for years. Some see them as an expensive hassle, while others view them as a necessary component of modern diesel engines. The debate has fueled myths and misinformation, leading many...
Broken Cummins or PACCAR DOC Baffle? Fix It, Don’t Replace It!
If you’re a fleet manager or truck owner, you know the pain of dealing with diesel oxidation catalyst (DOC) failures. Whether you’re driving a PACCAR MX-13, MX-11, or a Cummins X15, broken baffles can trigger expensive repairs and extended downtime. But don’t worry—DPF Guys is here to save the day with affordable DOC cleaning and repair services. And with references to PACCAR’s E254 and Cummins’ TSB180046, we’ve got you covered with solutions that save thousands!
Understanding California’s Clean Truck Check — and How Remote Emissions Monitoring Changes Everything
California’s Clean Truck Check (CTC) program represents one of the most important changes in trucking regulations in recent memory. The state is no longer relying on occasional inspections or targeted enforcement to catch high-polluting vehicles. Instead, California...
Cummins X15 Broken DOC Baffle? Symptoms & How DPF Guys Can Fix It Fast!
If you're dealing with fault codes 1664, 1691, 1922, 2692, 3256, 3376, 3396, or 4449 on your Cummins X15 CM2350 X114B or X15 CM2350 X116B, there’s a good chance your DOC baffle is broken—and that means trouble. Regens keep failing, soot builds up, and eventually, your...
The Silent Killer of Diesel Emissions Systems: What They’re Not Telling You About DOC Face Plugging
In the early days of diesel aftertreatment, most drivers thought the diesel particulate filter (DPF) was the problem child. If your rig threw a code, failed to regen, or lost power, it must be the DPF, right? Wrong. Behind the scenes, a more insidious failure has...
Carbon B Gone and the Science of DPF Cleaning: Clearing Up the Confusion
Introduction Fleet managers and diesel owners are always looking for easier ways to keep DPFs clean. Products like Carbon B Gone market themselves as chemical solutions that “break down carbon and ash.” In some of their own wording, the claim goes further: the ash...
Keep Rust Off Your Nuts (And Bolts Too)
Rust is like that one coworker who never showers: once it shows up, it spreads, stinks, and nobody wants to deal with it. On trucks, fastener corrosion is not just ugly, it is expensive, dangerous, and one stripped stud away from ruining your day. So how do you keep...
The 2015 Freightliner Cascadia Emissions Challenge: How Fuel Mapping Issues Lead to DEF Quality Codes and SCR Damage
In the intricate world of diesel emissions systems, precision is paramount. For the 2015 Freightliner Cascadia, however, a critical flaw in fuel mapping during its production has left many truck owners facing persistent, costly issues. Late-model 2014 and early-model 2016 Cascadias also suffer from this problem, which manifests most acutely when trucks are under load, climbing grades, or hauling heavy weights.
The Road to Zero Emissions: Navigating Regulations, Challenges, and Solutions for Fleets
As California forges ahead with groundbreaking emissions regulations, the trucking industry is left grappling with how to adapt to these sweeping changes. From the Advanced Clean Trucks (ACT) and Advanced Clean Fleets (ACF) rules to the EPA’s approval of CARB’s...
Freightliner M2 Emissions and Maintenance Guide
The Freightliner M2 is one of the most widely used medium duty trucks in North America. From delivery fleets and municipal trucks to ambulances and vocational work trucks, the M2 is everywhere. With that workload comes one reality: emissions problems. If you own or...
On-Truck DPF Cleaning Chemicals Compared Side by Side
Introduction Truck downtime is expensive, and nobody likes pulling a diesel particulate filter (DPF) off a truck just to get it cleaned. That’s why the aftermarket has long pushed “on-truck” chemical cleaners—spray it in, let it soak, run the truck, and the filter is...