Sierra Heavy Equipment Repair — Irving, TX
Diesel Diagnostics for Heavy Equipment in Irving, TX
Engine down? Derate light on? We bring diagnostic tools to your Irving jobsite and fix it in the field.
Diagnosis: $150–$250 (Based on equipment + travel distance)
No-start or hard start
Glow plug failure, fuel supply blockage, compression loss, or starter motor fault.
Derate / limp mode
DEF quality sensor, SCR catalyst fault, NOx sensor failure forcing reduced engine power.
Regen problems
Blocked DPF, failed DOC, continuous regen cycles, or soot overload that won’t clear.
Injector failure
Rough idle, white or black smoke, power loss, or fuel diluting the oil.
Turbo issues
Boost leak, wastegate stuck open or closed, oil seal failure, audible whining.
Cooling system failure
Water pump leak, radiator plugged with debris, thermostat stuck, or head gasket breach.
- —Full diagnostic scan (CAT ET, John Deere Service Advisor, Kubota Diagmaster compatible)
- —Fault code diagnosis and clearing
- —DEF system repair (tank, pump, injector, quality sensor)
- —DPF forced regen and cleaning coordination
- —Injector testing and replacement
- —Fuel system bleeding, filter service, and lift pump repair
- —Cooling system pressure test, water pump, and thermostat replacement
- —Turbo inspection and boost leak testing
Equipment & Brands We Service
Call or Text
Tell us your location, equipment type, and symptoms. We confirm availability.
Dispatch & ETA
We send a tech from Irving with the right tools and parts for your issue.
On-Site Diagnosis
Your tech inspects the equipment, diagnoses the problem, and provides a clear estimate.
Repair & Invoice
We complete the repair on-site. You get an invoice and you’re back to work.
FAQ
Sierra Heavy Equipment Repair provides mobile diesel diagnostics and engine repair for heavy equipment in Irving, TX and across DFW. When your machine won’t start, goes into derate, or throws a fault code, we come to your jobsite with diagnostic tools and parts to get it running. Irving-based, family-owned.
Diagnosis fee: $150–$250 (Based on equipment + travel distance).Mon–Sat: 7 AM – 6 PM.
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