SERVICES

SERVICES

Comprehensive Diesel Repair & Performance Services in Leavenworth, KS

When your diesel engine needs expert care, trust the specialists at HP Diesel Repair. Based in Leavenworth, KS, we provide top-tier diesel repair, maintenance, and performance enhancement services for truck owners and businesses throughout the area. Whether you're dealing with engine trouble, power loss, fuel contamination, or looking to boost your vehicle’s performance, our skilled mechanics are here to help.


A diesel engine that struggles to start or won’t turn over can be caused by fuel delivery problems, sensor failures, weak batteries, or compression issues. These issues can leave you stranded and disrupt your daily operations.

Our team performs thorough diagnostics to pinpoint the cause, checking fuel injectors, glow plugs, battery voltage, and compression levels. We repair or replace faulty components to restore quick and reliable startups, even in cold weather conditions.


If your diesel truck is losing power, the culprit could be a clogged fuel filter, failing turbocharger, malfunctioning EGR valve, or restricted exhaust. A drop in power reduces efficiency and can lead to costly breakdowns if not addressed promptly.

We conduct a complete engine performance check, inspecting air intake systems, fuel pressure, and turbocharger efficiency. Whether it’s a dirty mass airflow sensor or a worn-out high-pressure fuel pump, we’ll identify and fix the issue to restore peak performance.

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Thick black smoke from your exhaust is often a sign of over-fueling, restricted airflow, or turbo failure. Running too rich can lead to poor fuel economy and long-term engine damage.

Our team assesses fuel injectors, air filters, and EGR systems, making necessary adjustments or replacements. We also perform DPF (Diesel Particulate Filter) cleaning to reduce emissions and improve efficiency.


Contaminated diesel fuel can lead to injector failure, misfires, and reduced performance. Common contaminants include water, algae growth, and dirt in the fuel system.

We provide fuel system flushing, injector cleaning, and filter replacements, ensuring your truck runs smoothly and efficiently. Our preventive maintenance services help protect your fuel system from future contamination.


Old or poor-quality oil can cause sludge buildup, excessive engine wear, and poor lubrication, leading to premature engine failure.

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Our oil change and viscosity correction services ensure your engine stays properly lubricated. We use high-grade diesel oils designed for your truck’s specific needs, enhancing performance and longevity.

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Diesel engines rely on glow plugs for cold starts. When they fail, you’ll experience rough idling, hard starts, and excessive smoke in colder temperatures.

We test and replace faulty glow plugs and inspect wiring, relays, and control modules to ensure smooth and efficient startups, even in freezing conditions.


Faulty fuel injectors can cause misfires, loss of power, rough idling, and increased fuel consumption. Over time, injectors can clog due to carbon buildup, poor fuel quality, or wear and tear.

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We offer professional injector cleaning, repair, and replacement services, restoring your engine’s fuel efficiency and power. We also check fuel pressure regulators and high-pressure fuel pumps to prevent future injector issues.

Diesel Performance Upgrades

Looking to enhance your truck’s power and efficiency? We provide performance upgrades designed for increased horsepower, torque, and fuel economy, including:

Turbocharger Upgrades:

 Install high-performance turbos for improved towing power and acceleration.

ECU Tuning & Custom Programming:

Optimize fuel injection timing and boost levels for maximum efficiency.

High-Flow Exhaust Systems:

Reduce backpressure for better engine performance and fuel economy.

Cold Air Intake Systems:

Increase oxygen supply to the engine, improving combustion and responsiveness.


Upgraded Fuel Systems:

Install high-performance injectors and fuel pumps for increased power output.

Intercooler Upgrades:

Lower intake temperatures to enhance turbo efficiency and engine longevity.

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