Diesel Repair Shop Highlights Power Loss Under Towing Loads

Fort Lupton, Colorado - July 08, 2026 -

Colorado Transmission & Diesel Specialists is drawing attention to a common diesel complaint among truck owners around Brighton, Colorado: a noticeable loss of power under load when hauling trailers or heavy workloads. The shop says the problem is a diagnosable system fault rather than something owners should learn to live with.

Colorado Transmission & Diesel Specialists provides diesel repair in Brighton, Colorado, including diagnosis and repair of the turbo lag, boost loss, and reduced power that diesel owners often notice when towing along the I-76 corridor and over the area's grades. The shop treats power loss under load as a fault to be traced to its cause, not a permanent condition of an aging engine. Trucks used for towing and hauling around the area are usually the first to surface it, because the shortfall is felt most when the engine is asked to work hardest.

For many diesel owners, the symptom shows up gradually. A truck that once pulled a loaded trailer up a grade without strain begins to feel sluggish, slower to respond when the throttle goes down, or short on power when the engine is working hardest. Because the change creeps in over months, it is easy to put it down to age or high mileage. In most cases, though, it points to a specific and traceable issue on the air, boost, or fuel delivery side of the engine.

Turbo lag and boost loss are among the most frequent causes. A turbocharger slow to build boost, a leak somewhere in the charge-air system, a restricted air filter, or a fuel delivery problem will each leave a diesel down on power under load, and each leaves different evidence behind. A boost leak behaves differently from a failing turbocharger, which in turn behaves differently from a fuel-side fault. Telling them apart is the difference between a repair that resolves the problem and one that only narrows it down.

Diagnosing the cause early matters for more than just the engine. A diesel struggling for power under load forces the transmission and the rest of the drivetrain to work against it, and a symptom left to worsen across a towing season can turn a contained repair into a larger one. Reading the signal while it is still mild generally keeps the fix smaller and protects the systems downstream of the engine. Owners often notice fuel economy slipping as the engine compensates, adding to running costs on top of the lost performance.

The shop's response is to test rather than guess. Boost pressure diagnostics and airflow testing are used to locate which part of the system is responsible before any component is replaced, an approach that applies across the Powerstroke and the other diesel platforms common to the area's work trucks. Replacing parts one at a time until the symptom clears, by contrast, runs up the cost and time without any guarantee that the real cause is ever addressed.

"We see trucks come in down on power under load all the time, and owners are often surprised it's something we can actually pin down," said Doug Friedlan, owner of Colorado Transmission & Diesel Specialists. "Turbo lag or a boost leak isn't something you have to put up with. We test the boost and the airflow, find what's actually causing it, and fix that, rather than guessing our way through a stack of parts. On a truck you tow with, that's the difference between a quick repair and a long one."

For owners who tow and haul across the corridor north of Denver, the shop frames its message as practical. A diesel that has lost power is telling the driver something, and the sooner that signal is read, the simpler the repair tends to be. Updates on the shop's diesel work are posted to its Instagram profile, and further information about its diesel services is available on the company website.

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For more information about Colorado Transmission & Diesel Specialists, contact the company here:

Colorado Transmission & Diesel Specialists
Doug Friedlan
303-655-3738
ctds1021@gmail.com
1021 Denver Avenue
Fort Lupton
CO
80621