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Handheld diesel diagnostic scan tool plugged into a semi truck diagnostic port

Diesel Engine Repair & Diagnostics

Diesel Engine Repair & Diagnostics in Center, TX from Salas Diesel Truck Repair Shop. Hard starts, low power, black smoke, warning lights or a diesel engine that just does not sound right.

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At a glance

What's included in Diesel Engine Repair & Diagnostics

A diesel engine problem rarely starts big. It starts with a slight loss of power on a grade, a little more smoke than usual, a check-engine light that comes and goes, or fuel mileage that slowly drops. Left alone, those small signs can turn into injector failure, turbo damage or a blown head gasket that keeps a truck off the road for weeks. At Salas Diesel Truck Repair Shop we start every engine job by listening to you, because the driver usually knows the truck better than any scanner. Then we connect diagnostic equipment, read fault codes, check live sensor data and back it up with hands-on tests such as fuel pressure, boost and compression checks. That combination lets us separate the root cause from the symptoms, so you pay to fix the problem once instead of replacing parts by guesswork. Once we know what is wrong, we explain it in plain language, tell you what needs doing now and what can wait, and only then start the repair. Our family has worked on diesel engines for generations, and that experience shows in how carefully we approach every engine that rolls into our bay on US-96.

Handheld diesel diagnostic scan tool plugged into a semi truck diagnostic port

Included in this service

  • Computer diagnostics and fault code reading
  • Fuel system and injector testing
  • Turbocharger inspection and repair
  • Cooling system and overheating diagnosis
  • Exhaust, EGR and aftertreatment troubleshooting
  • Compression and blow-by testing
  • Starting and charging system checks
  • Oil leak and coolant leak repair

Sub-services

  • Engine Diagnostics
  • Engine Repair
  • Diesel Troubleshooting

Warranty available on qualifying repairs, quality workmanship on every repair, and a customer satisfaction commitment on every truck we touch.

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The Process

How does Diesel Engine Repair & Diagnostics work?

A simple, honest process from your first call to the moment your truck is back on the road.

  1. 01

    Tell us the symptoms

    Call or send the form and describe what the engine is doing, when it started and any warning lights.

  2. 02

    Diagnostics

    We scan the engine, review live data and run hands-on tests to confirm the root cause.

  3. 03

    Repair

    Once you approve the work, we complete the engine repair with quality parts and careful workmanship.

  4. 04

    Final check

    We road test and re-check the engine so your truck leaves ready to work.

Why Choose Us

Why choose us for Diesel Engine Repair & Diagnostics?

Root-cause diagnostics

We test before we replace, so you are not paying for parts the truck never needed.

Generations of diesel know-how

Our technicians grew up around diesel engines and know how they behave under real working loads.

Straight answers

You hear what is wrong, what it will take and what can wait, before any work begins.

Warranty on qualifying repairs

Qualifying engine repairs are backed by warranty, so you can drive away with confidence.

What does Diesel Engine Repair & Diagnostics cost?

Every diesel engine repair is quoted after diagnostics, because the price depends on the engine, the parts required and how much labor the repair takes. Estimates are free.

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What Center, TX customers say

Service Areas

Where we provide Diesel Engine Repair & Diagnostics

Based in 2706 U.S. 96, Center, TX 75935, we cover Center, TX and the surrounding neighbourhoods.

  • Center
  • Shelbyville
  • San Augustine
  • Nacogdoches
  • Timpson
  • Tenaha
  • Joaquin

Common Questions

Diesel Engine Repair & Diagnostics questions we hear most

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Still need help?

Talk to Chris Salas — we’re a quick call away.

Monday–Friday: 8:00 AM–5:00 PM; Saturday: By Appointment Only; Sunday: Closed · 2706 U.S. 96, Center, TX 75935

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