Mobile Diesel Engine Repair in Tuscaloosa, AL
Call 205-880-4928 for mobile diesel repair in Tuscaloosa.
When your diesel engine throws a check engine light, loses power on the highway, or refuses to start at a loading dock in Tuscaloosa, you need a mobile diesel mechanic who can diagnose and fix the problem on-site. Mr. Tuscaloosa Mobile Truck Repair brings full diesel diagnostic and repair capability directly to your truck anywhere in the Tuscaloosa area.
Diesel Engines We Service
Our mechanics work on every major diesel engine platform running through Tuscaloosa:
Cummins ISX15 and X15 – The most common engine in OTR trucks. We handle injector diagnosis and replacement, turbocharger service, EGR valve and cooler work, DPF regeneration and cleaning, aftertreatment system faults, and fuel system problems. The ISX15 is known for injector and turbo issues at higher mileage. We carry common Cummins parts on our service truck and use Cummins Insite diagnostic software for accurate fault code interpretation.
Detroit Diesel DD13 and DD15 – Standard in Freightliner Cascadias, the most common truck on American highways. We diagnose and repair aftertreatment problems, turbo actuator failures, oil leaks from front and rear seals, and EGR position sensor faults. DD15 DPF issues are one of our most frequent service calls. We use Detroit Diesel Diagnostic Link (DDDL) software.
Paccar MX-13 and MX-11 – Found in Kenworth and Peterbilt trucks. Common issues include injector failures, oil consumption, and turbo problems at higher mileage. We use Paccar Davie software for diagnostics.
International A26 – The newer engine platform in International LT and HX trucks. We work with Navistar Diamond Logic diagnostics for engine, aftertreatment, fuel system, and electrical issues.
Volvo D13 and D11 – Powering Volvo VNL trucks across the country. We diagnose EGR, aftertreatment, injector, and turbo problems with Volvo Tech Tool software.
Common Diesel Problems We Fix On-Site
Overheating and Cooling System Failures – Radiator leaks, water pump failures, thermostat malfunctions, and clogged cooling fins. When your temp gauge climbs past 220 degrees, pull over and call us. Driving on an overheating diesel causes catastrophic damage including cracked heads, warped liners, and blown head gaskets. We carry coolant, thermostats, hoses, and clamps for same-visit repairs.
Fuel Injector Failures – Rough idle, white smoke at startup, fuel in the oil, or a cylinder misfire. Modern diesel injectors run at 30,000+ PSI and they wear out. We diagnose injector problems with OEM-level scan tools using injector cutout tests, contribution tests, and rail pressure analysis.
Turbocharger Issues – Loss of power under load, excessive black smoke, oil leaking from turbo seals, or a whistling noise that was not there before. We check boost pressure, wastegate operation, VGT actuator function, and intercooler integrity. Turbo problems left unfixed lead to engine damage.
DPF and Aftertreatment Problems – Diesel Particulate Filter plugging is common in trucks running stop-and-go routes. Low-speed driving prevents passive regen, and the filter clogs. We perform forced DPF regenerations with our scan tools, clean DOC and DPF assemblies, diagnose DEF quality sensors and NOx sensor faults, and troubleshoot SCR system errors.
EGR System Faults – Stuck EGR valves, cracked EGR coolers, and high NOx codes. We test EGR valve operation, inspect coolers for leaks, and replace failed components on-site.
Hard Start and No-Start Conditions – Fuel supply issues, glow plug failures on older trucks, low compression, or air in the fuel system. We systematically diagnose no-start conditions with fuel pressure testing, cranking amp checks, and compression testing when needed.
Our Diagnostic Equipment
We do not guess. We diagnose. Our service trucks carry laptops loaded with OEM diagnostic software for every major engine platform. That means we read manufacturer-specific fault codes (not just generic OBD codes), view live sensor data, run forced regens, perform cylinder cutout tests, calibrate injectors, and access ECM programming. The difference between a generic code reader and OEM software is the difference between guessing and knowing what is wrong.
We also carry diesel fuel pressure test kits, boost leak testers, coolant pressure testers, multimeters, and amp clamps for electrical testing. Our goal is to diagnose accurately on the first visit and fix it the same day whenever possible.
Service Area for Diesel Repair
We provide mobile diesel engine repair across Tuscaloosa and the surrounding area including Northport, Vance, Bessemer, Demopolis, and Eutaw..
Call Mr. Tuscaloosa Mobile Truck Repair at 205-880-4928 for mobile diesel engine repair in Tuscaloosa, AL.
Related Services
Engine problems often affect other systems. If your truck has brake issues alongside engine trouble, our mechanics can diagnose both on the same visit. For trucks that will not start, check our electrical and starting system repair page.