Accurate Repairs for Every Fuel Component

Lock In Fuel System & High-Pressure Fuel System Repair in Midland

Your diesel engine depends on precise fuel delivery to run smoothly, and failures in high-pressure fuel pumps, injectors, or rails can cause hard starts, misfires, and contamination issues. When you need fuel system repairs in Midland, Lonewolf Diesel provides certified diagnostics and repairs that address both low-pressure and high-pressure components. Our Caterpillar- and Cummins-certified team ensures precise calibration and installation, restoring proper combustion and fuel economy.


West Texas diesel engines run in harsh oilfield conditions where dust and contamination threaten fuel system integrity. Midland's demanding environment makes fuel system maintenance critical for heavy-duty trucks, work trucks, and commercial fleets. We diagnose injector failure, contamination, rail pressure issues, and pump malfunctions using factory-grade tools, then repair or replace components with high-quality parts designed for long-term reliability.


Schedule your fuel system diagnostics in Midland at the first sign of misfires or starting problems.

Details That Matter Most

Fuel system repairs in Midland begin with thorough diagnostics to identify the source of the problem. Our technicians measure fuel rail pressure, test injector flow rates, check return lines for leaks, and evaluate low-pressure pump operation. High-pressure fuel systems require exact tolerances, and even small deviations can cause poor performance, smoke, and reduced power.


Lonewolf Diesel addresses common issues like hard starts, misfires, injector failure, and contamination with precision and care. Caterpillar- and Cummins-certified mechanics ensure precise calibration and installation. We support heavy-duty trucks, work trucks, and commercial fleets across all major diesel platforms, including Powerstroke, Duramax, and International engines.


After repairs, we test the system under load conditions to verify proper fuel delivery, combustion efficiency, and injector response. This ensures your engine runs smoothly and meets manufacturer specifications. Improved fuel economy and restored power are the results you can expect from our fuel system repairs.

How Our Process Works

Fuel system repairs involve multiple components and precise diagnostics. Below are answers to common questions about our high-pressure fuel system repair process and what you can expect.

What causes high-pressure fuel pump failure?
Common causes include contaminated fuel, worn internal components, inadequate lubrication, and age-related wear. Dusty conditions in Midland can accelerate contamination and pump damage.
How do you test fuel injectors?
We use specialized injector testing equipment to measure flow rates, spray patterns, and response times. This helps us identify clogged, leaking, or misfiring injectors that need replacement or cleaning.
Can contaminated fuel damage my fuel system?
Yes, contaminated fuel can clog injectors, damage the high-pressure pump, and cause premature wear on seals and valves. We recommend fuel filtration upgrades and regular filter changes to prevent contamination.
Do you calibrate injectors after installation?
Absolutely. We use scan tools to program injector codes and calibrate fuel delivery to ensure proper combustion and smooth engine operation. Calibration is essential for high-pressure fuel systems.
What are the signs of injector failure?
Symptoms include rough idling, excessive smoke, hard starts, misfires, and reduced fuel economy. You may also notice a strong diesel smell or fuel in the oil.

Fuel system repairs keep your diesel engine running efficiently and reliably, no matter how demanding the conditions. Our certified team is ready to diagnose and repair every component with precision and care. Contact us in Midland to schedule your fuel system diagnostics today.