Mon – Fri 8:30AM – 6:00PM / Sat 8:30AM – 2:00PM

  • (281) 727-9374

  • Info@alltechdiesel.com

AllTech Diesel Houston TX diesel truck repair services
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Houston, TX · Diesel Specialists

Every Service
Your Diesel
Needs.

From ECM diagnostics and custom ECU tuning to full engine overhauls and fleet maintenance — AllTech Diesel handles it all with factory-grade precision. One shop. Every platform. No guesswork.

Call (281) 727-9374 Book Appointment
Jump to Service
ECM Diagnostics ECU Tuning DPF Solutions EGR System Repair Engine Repair Preventive Maintenance Fleet Programs
Free Diagnostic
For new customers
Same-Day Service
Most diagnostics & repairs
Certified Technicians
All major diesel platforms
Factory-Grade Tools
Dealer-level ECM access
What We Do

Our Services

Specialized diesel repair across every system — diagnosed accurately, repaired correctly, and completed fast.

02
Custom ECU Tuning
Unlock more from your engine. Our technicians recalibrate ECU parameters to improve torque delivery, fuel efficiency, and throttle response — applied safely within manufacturer tolerances using factory-grade software.
  • Torque and power curve optimization
  • Fuel consumption recalibration
  • Idle and throttle response adjustment
  • Turbo boost threshold refinement
Discuss Tuning Options
All platforms supported
03
DPF Solutions
DPF issues are one of the most common causes of power loss and forced regeneration cycles in Houston's heavy-duty trucks. We diagnose the root cause — not just clear the code — and give you a lasting fix.
  • DPF cleaning and flow testing
  • DPF replacement (all brands)
  • Forced regeneration and regen failure diagnosis
  • Full emissions system inspection
Get DPF Diagnosis
Root cause diagnosis
04
EGR System Repair
A failing EGR system causes excessive smoke, rough idle, power loss, and elevated engine temperatures. We service the complete EGR circuit — valve, cooler, and associated sensors — restoring clean combustion and system efficiency.
  • EGR valve cleaning and replacement
  • EGR cooler repair and replacement
  • Boost and backpressure sensor diagnosis
  • Post-repair smoke and performance verification
Schedule EGR Service
Full circuit service
05
Engine Repair & Overhaul
From replacing a failed injector to performing a complete engine overhaul, we handle every level of engine work on Cummins, Detroit Diesel, Caterpillar, and other major platforms. Every repair starts with a precise diagnostic — no guessing, no unnecessary parts.
  • Injector replacement and fuel system service
  • Head gasket and valve train repair
  • Turbocharger replacement and inspection
  • In-frame and out-of-frame overhauls
Get Engine Estimate
All major platforms
06
Preventive Maintenance
The best repair is the one you never need. Our PM service keeps your truck running at peak condition between major intervals — protecting your investment and preventing costly failures before they happen.
  • Oil and filter changes (synthetic & conventional)
  • Coolant flush and antifreeze service
  • Air intake and fuel filter replacement
  • Belt, hose, and serpentine inspection
  • Full multi-point inspection report
Schedule PM Service
Custom intervals available
Free for New Customers
How Our Diagnostic Works
1
Connect & Scan
We connect factory-grade diagnostic equipment directly to your engine's control system and pull the complete fault code history — active faults, pending codes, and stored codes.
2
Analyze & Verify
Our technician interprets the data in context, cross-referencing fault codes with live sensor readings and engine parameters to confirm the true root cause — not just the symptom.
3
Report & Quote
You receive a plain-language explanation of the problem and a written estimate. No work begins until you approve it. No pressure. No surprises.
4
Repair & Verify
Once approved, we complete the repair and run a post-repair verification scan to confirm all fault codes are resolved and all systems are communicating correctly.
Factory-Grade Precision

The Right Tools
Make All
the Difference

Most diesel repair shops use generic code readers that give you a fault number — and not much else. AllTech Diesel uses the same diagnostic equipment used by authorized manufacturer service centers, giving us access to every parameter, every datastream, and every calibration option the platform supports.

The result: faster diagnosis, fewer misdiagnoses, and repairs that stick the first time. We don't clear codes and hope for the best. We find out why the fault exists and fix the source.

10K+
Trucks Diagnosed
99%
Satisfaction Rate
10+
Years Experience
13
Brands Supported
Book a Diagnostic Now
01
Call or Book Online
Contact us by phone or through our online form. Describe the issue and we'll confirm the right appointment window for your schedule.
02
Bring In Your Truck
Drop your truck at 4215 Guessena St., Houston TX 77020. New customers receive a free diagnostic scan. We start work right away — no waiting in line.
03
Diagnose & Approve
We diagnose the problem with factory-grade tools, explain the findings in plain language, and give you a written estimate. You approve before any work begins.
04
Back on the Road
We complete the repair, run a final verification scan, and return your truck — most jobs same-day. You leave with a receipt, warranty documentation, and zero surprises.

Diesel Brands We Service

Cummins Detroit Diesel Caterpillar Volvo Paccar Mack International Navistar Isuzu Freightliner Kenworth Peterbilt Hino
For Houston Operators

Fleet Maintenance
Programs

Downtime isn't just an inconvenience — it's lost revenue. AllTech Diesel's fleet maintenance program is built around keeping your vehicles running, not waiting in a service queue. From two-truck owner-operators to large commercial fleets, we build a custom service plan around your operation.

Every fleet account gets a dedicated coordinator, priority scheduling, and a maintenance tracking system that makes sure nothing falls through the cracks.

Priority Scheduling
Fleet trucks go to the front of the line — always. Emergency breakdowns get immediate attention.
Multi-Unit Pricing
Discounted rates for multi-vehicle accounts. Invoicing and net terms available for qualified fleet customers.
Interval Tracking
We track every service interval across your fleet so you never miss a PM or run past a critical service date.
Dedicated Coordinator
One point of contact for scheduling, invoicing, and service history across your entire fleet.
Set Up a Fleet Account
10K+
Trucks Serviced
10+
Years in Houston
4.7★
Google Rating
99%
Satisfaction Rate
We Work With
Owner-Operators Trucking Companies Logistics Operators Construction Fleets Municipal Fleets Gulf Coast Operators
Ready to Get Started?

Your Truck.
Our Expertise.

New customers get a free diagnostic scan. We tell you exactly what's wrong before quoting a single repair — no pressure, no guesswork, no surprises.

Call (281) 727-9374 Book Appointment

Mon–Fri 8:30AM–6PM  ·  Sat 8:30AM–2PM  ·  4215 Guessena St., Houston TX

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