Heavy-Duty Diesel Repair

Semi-truck diesel engine down on I-10?
We repair it roadside.

Mobile diesel diagnostics and repair for Cummins, Detroit, PACCAR & CAT engines. Serving Mobile & Baldwin County 24/7.

18 min
Avg response
24/7
Always open
All HD
Semis & fleet

Need diesel help now?

We respond within 90 seconds

Request Sent!

We received your request and will call you within 90 seconds.

Call (251) 234-4623

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Call (251) 234-4623

Licensed & Insured

CDL-certified heavy-duty diesel technicians.

18–25 Min Response

GPS-tracked ETA to your breakdown location.

No Fix, No Fee

Pay only if we complete the diesel repair.

Diesel Engine Repairs We Handle

Commercial-grade diagnostic scanners and heavy-duty tools brought to your truck. Most issues diagnosed in minutes.

Engine Diagnostics

Check engine light, loss of power, hard starting, excessive smoke. We scan and diagnose Cummins, Detroit, PACCAR & CAT on-site.

Fuel System Repair

Injector testing, fuel pump diagnostics, fuel filter replacement, and line leak detection for common-rail and HEUI systems.

Cooling System

Radiator leaks, hose replacement, coolant refill, water pump diagnostics, and EGR cooler issues. Keep your diesel running cool.

Battery & Charging

Dual battery testing, alternator diagnostics, and high-amperage jump starts for diesel engines with multi-battery configs.

Turbo & After-Treatment

Turbocharger diagnostics, boost leak testing, DPF regen issues, and DEF system troubleshooting.

Air System & Brakes

Air compressor diagnostics, air line repair, brake chamber service, and S-cam adjustment. DOT-compliant repairs.

Diesel Problems We See Most

These are the top diesel engine issues our technicians handle daily on I-10, I-65, and at truck stops across Mobile County.

Loss of Power

Weak acceleration, limp mode, or inability to maintain highway speed. Often caused by turbo, fuel, or DPF issues.

Overheating

Coolant leaks, water pump failure, thermostat issues, or EGR cooler leaks. We diagnose and refill on-site.

Hard Starting / No Start

Battery drain, starter issues, fuel system air intrusion, or glow plug failure. We test and repair on location.

Excessive Smoke

Black, white, or blue smoke indicates fuel, coolant, or oil burning issues. We identify the source fast.

Brake & Air Issues

Air line leaks, compressor failure, brake chamber problems. DOT violations can sideline your truck instantly.

Check Engine / MIL

We read fault codes with commercial-grade scanners and advise on immediate vs. scheduled repair.

Diesel Brands We Service

Our technicians are experienced with the most common heavy-duty diesel engines on the road today.

Cummins

ISX, X15, ISB, ISL, and legacy models. Turbo, fuel, after-treatment, and ECM diagnostics.

Detroit Diesel

DD13, DD15, DD16, Series 60. Fuel system, emissions, and engine controller diagnostics.

PACCAR MX

MX-11 and MX-13 engines. After-treatment, fuel efficiency issues, and emissions troubleshooting.

Caterpillar (CAT)

C7, C9, C13, C15, C16. Legacy CAT engines still common in older fleet trucks and dump trucks.

How Mobile Diesel Repair Works

1

Call (251) 234-4623

Tell us your truck, engine, location, and symptoms. We're available 24/7 for diesel breakdowns.

2

We Come to Your Truck

Dispatched to your exit, truck stop, or shipper with diesel diagnostic tools and common parts.

3

Diagnosed & Repaired On-Site

Most diesel issues diagnosed in 15–30 minutes. Repair labor from $95. No Fix, No Fee.

No Fix, No Fee Guarantee — If we can't repair it, you don't pay for labor.

Where We Service Diesel Trucks

We patrol I-10, I-65, and major trucking corridors daily. All truck stops, ports, and distribution centers.

Diesel Repair Frequently Asked Questions

Can you repair my diesel engine on the roadside in Mobile, AL?

Yes. We provide mobile diesel engine repair and diagnostics throughout Mobile and Baldwin County. We handle Cummins, Detroit Diesel, PACCAR, and CAT engines. Our technicians carry commercial-grade diagnostic scanners and common parts for roadside repairs.

What diesel engine brands do you service?

We service Cummins, Detroit Diesel, PACCAR (MX engines), and Caterpillar (CAT) diesel engines commonly found in semi-trucks, tractor-trailers, box trucks, and fleet vehicles.

How much does mobile diesel engine repair cost?

Diesel diagnostic service calls start at $95. Pricing depends on the specific repair, parts needed, and your location. We provide a firm quote before beginning any work. No Fix, No Fee on repair labor.

Do you come to truck stops and ports in Mobile?

Yes. We service all major trucking corridors including I-10, I-65, Highway 90, and Highway 98. We respond to breakdowns at truck stops (Love's, Pilot, TA), rest areas, weigh stations, port facilities, and shipper/receiver locations.

Don't let a diesel breakdown cost you a load.

Most diesel issues are diagnosed on-site in 15–30 minutes. Call now and we'll be on our way.

Call (251) 234-4623