DIESEL REPAIR

Your Go-To Diesel Repair Shop in Louisville, KY

Diesel trucks are built for the long haul, but even the toughest engines need attention from people who know what they’re doing. At Barnes Auto Service, we’ve spent decades earning Louisville’s trust by delivering reliable diesel repair with no games and no shortcuts. We specialize in Ford Powerstroke and Cummins engines, and we treat every truck like it’s our own, because around here, diesel service is personal.

Powerstroke & Cummins: We Know Diesel

Louisville knows us as the shop that understands Powerstroke engines better than anyone. From fleet F-250s to hard-working F-550s, we’ve tackled it all, because Powerstroke is in our wheelhouse. We also bring that same level of skill and care to Cummins-powered Rams, delivering dependable diesel repair no matter what badge is on your grille.

Ford Powerstroke

We know Powerstroke engines inside and out. From turbo issues to injector problems, we deliver dealership-level diagnostics without the hassle. We service all major Powerstroke platforms:

6.7L Powerstroke – F-250 to F-550 Super Duty
6.4L Powerstroke – Common turbo and EGR repairs
6.0L Powerstroke – Known for reliability with the right care
7.3L Powerstroke – Built to last, and we help them go farther

With years of experience and Ford-specific tools, we keep your truck working like it should.

Ram Cummins

Cummins engines are built for power, and we’re built to service them. From fuel and turbo issues to emissions repairs, we’ve got your Ram covered. We service:

5.9L Cummins – 12-valve and 24-valve models
6.7L Cummins – Found in Ram 2500 and 3500 pickups

Whether it’s preventative maintenance or in-depth diagnostics, our ASE-certified team is here to keep your diesel on the road.

“The difference between good and great? Just a little extra effort.”

– Biggie Munn

Common Diesel Repairs We Handle

Diesel trucks work hard, and over time, that stress adds up. Here are some of the most common diesel issues we see in our shop:

Hard starts or no-start conditions
Black, white, or blue exhaust smoke
Turbocharger failure or low boost
EGR and DPF failure

Fuel injector problems
Glow plug faults or CEL warnings
Oil or coolant leaks
Loss of power or poor fuel efficiency

Ignoring early warning signs can lead to bigger, more expensive issues. Let our diesel experts catch and correct them before they cost you.

One Stop for Everything Your Diesel Truck Needs

We’re more than just a quick-fix shop. We offer comprehensive diesel maintenance and repair services that go beyond the basics to keep your engine running strong, mile after mile.

Diesel Diagnostics & Electrical Testing

Using OEM-compatible scan tools and pressure testing, we perform precise diagnostics that get to the root of the issue, without guesswork or parts-swapping.

Fuel System Repair

From injection pumps and lines to high-pressure injectors and filters, we service and replace fuel system components for clean, efficient combustion.

Turbocharger Service

We test for proper boost pressure, inspect for shaft play or failure, and replace or upgrade turbos as needed, especially common on Powerstroke platforms.

EGR, DPF & Emissions Systems

Modern diesel engines depend on complex emissions systems to stay legal and efficient. We service and replace EGR valves, DPFs, sensors, and related components.

Cooling System Service

Overheating can ruin a diesel engine fast. We test radiators, water pumps, thermostats, and cooling fan systems to prevent heat-related failures.

Engine Oil & Filter Changes

Using diesel-rated oils and OE-spec filters, we protect your engine with properly timed oil service, critical for long-lasting diesel performance.

Transmission & Drivetrain Checks

Diesel trucks often experience drivetrain stress under heavy loads. We check U-joints, mounts, and automatic transmission performance as part of a full diesel service.

Customer-FriendlyAmenities

Maggie gives these extras two paws up.

Text-to-Pay

24-Hour Drop-Off & Pick-Up

Waiting Room with Free Wi-Fi – Pet Friendly

CFNA Financing Options

Towing Partner: Advantage Towing – (502) 749-2233

10% Discount for First Responders, Teachers, Nurses, Police & Military

What Makes Barnes the Go-Tofor Diesel Truck Service

When diesel drivers talk, we listen, because we know the difference between a truck that works and one that’s just patched up. At Barnes Auto Service, we combine technical expertise with personal care that goes the extra mile.

Master-Level Technicians:

Our team features 3 ASE Master Techs and a National Runner-Up Tech, all bringing real-world diesel knowledge to your repairs.

Repair You Can Trust, Warranty You Can Rely On:

Covered by a 24-month/24,000-mile nationwide warranty.

Dealer Tools Without the Dealer Games:

Powerstroke and Cummins diagnostics using factory-grade tools and no pushy upsells.

Rooted in Louisville:

A+ BBB rated, a Neighborhood Favorite, and deeply invested in giving back to the community we’ve served for over 40 years.

Service That Works for You:

24-hour drop-off/pick-up, easy financing, text-to-pay, and a comfortable waiting room for downtime that doesn’t disrupt your day.

Easy, convenient payments with no credit card processing fee:

Making heavy-duty repairs more manageable.

We are the bestOf The Best

Don’t just take our word for it—see why we’re Louisville’s top-rated auto shop! Check out our reviews and hear from satisfied customers who trust us to keep their vehicles running smoothly.

Get Your Diesel Back on Track.Book Today

From hard starts to rough shifts, diesel problems don’t get better with time. Let the diesel repair experts at Barnes Auto Service get your Powerstroke or Cummins back to peak performance, with honest answers and repairs done right. Stop by 3800 Bishop Lane, Louisville, KY 40218. Call us at 502-966-8644 or schedule your visit now at barnesautoservice.com.

Proudly serving diesel drivers in Fern Creek, St. Matthews, Mt. Washington, Middletown, Prospect, Crestwood, Audubon Park, and throughout the Louisville area. The little extra effort? It’s what makes all the difference.