Diesel Repair & Diagnostics in Avon, IN
Diesel trucks work harder and cost more to get wrong. Huddleston's Garage diagnoses and repairs diesel trucks and equipment of every make with the same honest, straight-answer approach we bring to every vehicle that rolls into our Avon shop.
Why Diesel Engines Need a Specialist
A diesel engine doesn't run like the gas engine most shops are used to. It compresses air until it's hot enough to ignite fuel on its own, runs far higher fuel pressure, and depends on a web of sensors, turbos, and emissions equipment to stay efficient and legal. When one part of that system drifts out of spec — a fuel injector, a turbo actuator, a DEF sensor — the truck can lose power, burn more fuel, throw codes, or go into a forced "limp" mode until it's fixed.
Diagnosing that correctly takes more than a generic code reader. It takes a technician who understands how the fuel, air, and emissions systems on a diesel platform interact, and who has the right tooling to test each one instead of guessing and swapping parts. That's the approach we take on every diesel that comes through our door — find the actual cause, explain it in plain terms, and fix it right the first time.
With years of hands-on diesel experience, we work on trucks and equipment of every make and model — not just the most common platforms.
Signs Your Diesel Needs Attention
- Check engine or "wrench" warning light, or a message about reduced power / limp mode
- Noticeable loss of power, hesitation, or rough idle
- Excess black or white smoke from the exhaust
- Hard starting, long crank times, or starting trouble in cold weather
- DEF (diesel exhaust fluid) or emissions-related warning messages
- Ticking, knocking, or whining noises from the engine or turbo
- Falling fuel economy with no change in driving habits
Any one of these is worth a proper diagnostic before it turns into a bigger repair — especially on a work truck you can't afford to have sidelined.
What Our Diesel Service Includes
Depending on what your truck needs, our diesel work covers:
- Diagnostics — full scan of engine, transmission, and emissions modules to pinpoint the actual fault, not just clear a code
- Fuel system service — injectors, lift pumps, high-pressure pumps, and fuel filtration
- Turbocharger diagnosis and repair — boost leaks, actuator and variable-geometry issues, and turbo replacement
- Emissions and DEF system repair — DPF, EGR, and DEF sensor or pump issues
- Diesel oil changes (Starting at $149.99) — heavy-duty filtration and oil rated for the demands of a diesel engine
- Cooling, electrical, and glow plug system diagnostics for hard-starting or overheating complaints
Diesel diagnostics are Starting at $165. See the full list on our pricing page, or tell us what your truck is doing and we'll scope the diagnostic from there.
Diesel Repair FAQ
Do you work on both gas and diesel trucks?
Yes. We service gas and diesel vehicles of every make, alongside our regular auto and fleet repair work.
How much does a diesel diagnostic cost?
Diagnostics are Starting at $165 and the final cost depends on the complexity of the issue. Check the pricing page for current prices, or call us with your symptoms for a more specific idea.
My truck is in limp mode — is it still safe to drive in?
Limp mode is the engine computer protecting itself, usually by capping power or RPM. It's best to have it looked at before continuing to drive on it regularly — call us and we can advise based on the specific codes and symptoms.
Do you handle DEF and emissions system repairs?
Yes, we diagnose and repair DEF, DPF, and EGR-related issues as part of our diesel service.