When your engine fails on I-77, every decision you make in the next few minutes matters. Whether the truck has lost power, won't restart, or is limping in derate mode, the worst thing you can do is push it further down the road without knowing what you are dealing with. Reid Diesel Enterprises dispatches mobile diagnostic units directly to your location along the I-77 and US-421 corridors, 24 hours a day, 7 days a week.
Call us immediately at (336) 468-2323. We respond to I-77 corridor breakdowns from our location at I-77 & 421 Exit 272 or 267 in North Wilkesboro, NC.
What Counts as an Engine Failure Emergency
Not every warning light requires you to pull over immediately, but some absolutely do. Knowing the difference can save your engine and your cargo. If you experience any of the following, stop as soon as it is safe to do so and call for help before attempting to restart or continue driving.
Stop immediately if you notice:
- Sudden or severe loss of engine power
- Temperature gauge climbing into the red zone
- Engine knocking, clanking, or unusual loud noises
- Heavy smoke from the exhaust or engine compartment
- Engine shutdown that will not allow restart
- Derate warning that has progressed to 5 mph or idle-only mode
Warning lights alone, without accompanying symptoms, are worth monitoring but do not always require an immediate stop. When in doubt, call us and describe what you are seeing. Our technicians can help you make the right call before you make the situation worse.
Visit our Emergency Information page for a complete breakdown protocol for I-77 drivers.
Common Engine Failure Scenarios We Respond To
Complete Loss of Power
A sudden loss of drive power on the highway is one of the most alarming breakdowns a driver can experience. Common causes include:
- Turbocharger failure
- Fuel system collapse
- Major sensor faults triggering a derate
- Catastrophic internal failures
Most catastrophic truck repair cases begin as subtle, ignored signs. The difference between minor repair and major failure is often just one ignored mile. If power loss comes with warning, think back to what you noticed in the hours or days before. That information helps our technicians diagnose faster when we arrive.
Engine Won't Start or Restart
A no-start situation on the roadside can come from several directions:
- A dead or failed battery
- Fuel system air intrusion
- A glow plug failure in cold weather
- An ECM fault that is preventing the engine from cycling.
Hard starting or failure to start can stem from a weak or dead battery, since diesel engines require a lot of power to start. Problems with the fuel system, such as clogged fuel filters or air trapped in the fuel lines, can also prevent the engine from firing properly. Do not drain your battery with repeated start attempts. Call us with your location and we will come to you.
Check Engine Light with Derate
Modern diesel engines use derate mode to protect themselves when the ECM detects a serious fault. Engine derate mode cuts power to force the driver to address the issue, preventing both mechanical damage and emissions violations. In the worst-case scenario, the truck may be slowed to a crawl at just five mph or even enter a shutdown condition if the fault is not resolved. Derate mode requires OEM diagnostic software to read and clear properly, not a generic scan tool. Reid Diesel carries manufacturer-level diagnostic equipment on every mobile unit.
Overheating-Related Shutdown
When coolant temperatures exceed safe limits, the ECM will reduce power and eventually shut the engine down to prevent head gasket failure, cylinder damage, and oil breakdown. The most frequent cause of diesel engine overheating is issues within the cooling system, including low coolant levels, leaks, or radiator blockages. Another common issue is poor coolant circulation due to a faulty water pump or clogged radiator hose. Do not attempt to restart an overheated engine until temperatures have dropped and the root cause has been identified.
Abnormal Sounds Before Failure
Engines rarely fail without warning. Knocking, ticking, rattling, or a sudden increase in exhaust noise often signal internal wear that is approaching a failure point. Diesel engine diagnostics data consistently shows injector failure, turbocharger compressor wheel damage, and EGR cooler cracking among the top engine-related complaints on commercial trucks.
If your truck has been making unfamiliar sounds, do not wait for the failure. Pull over, call us, and let our technicians assess the situation before it becomes a complete shutdown.
How Reid Diesel's Mobile Diagnostic Process Works
When you call, we dispatch a fully equipped service truck directly to your breakdown location. Our technicians arrive with OEM-level diagnostic software for all major engine platforms, including Cummins, Detroit, PACCAR, Volvo, and Mack. Aftertreatment systems on EPA 2010-compliant engines require OEM-specific diagnostic software such as Cummins INSITE, Detroit Diagnostic Link, or Navistar Diamond Logic, which generic scan tools cannot fully access. We do not guess.
Our on-site process works as follows:
- We retrieve fault codes
- Assess live data from the engine and aftertreatment systems
- Perform a visual inspection
- Give you an honest repair-or-tow recommendation before any work begins
If the repair can be completed roadside, we complete it there. If the truck needs to come in, we coordinate towing and can assist with hotel accommodations for drivers waiting on parts.
Fleet managers and dispatchers receive photo and video documentation of the fault and repair. We follow your carrier's authorization protocols and accept all major fleet cards.
See our full range of Class 8 truck repair services for more on what our technicians are equipped to handle.
What to Do While You Wait
Safety is the priority while you wait for our technician to arrive.
- Get fully onto the shoulder, away from the travel lane.
- Activate your four-way flashers immediately.
- Place warning triangles at 10, 100, and 200 feet behind the vehicle.
- Put on a high-visibility vest before exiting the cab.
- Stay with the truck and keep your phone available for updates.
- Note your mile marker, direction of travel, and any visible landmarks.
Do not attempt to restart a severely overheated or knocking engine while waiting. Share as many details as possible when you call so our technician arrives prepared with the right parts and tools.
Payment and Fleet Card Information
Reid Diesel accepts Comdata, EFS, T-Chek, all major credit cards, Zelle, and direct fleet account billing for established carriers. We provide complete, itemized repair documentation for dispatcher approval and reimbursement. Payment is never a barrier to getting help when you need it.
Frequently Asked Questions
Can you diagnose my engine failure on the roadside?
Yes. Our mobile units carry OEM diagnostic software for all major engine and aftertreatment platforms. We can read fault codes, assess live data, and perform a full diagnostic at your breakdown location without requiring you to tow to a shop first.
What if the repair can't be done roadside?
We provide an honest assessment of what is needed. If the repair requires shop equipment, we coordinate heavy-duty towing to our facility at I-77 & 421 Exit 272 or 267 and assist with driver accommodations if overnight work is required.
How do I know if I should stop immediately or limp to an exit?
If you have engine knocking, a temperature gauge in the red, heavy smoke, or a derate that has progressed to 5 mph, stop immediately. Continuing to drive in these conditions risks turning a repairable failure into a complete engine loss. Call us and we will advise based on what you describe.
Do you carry common engine parts on your service trucks?
Yes. Our service trucks are stocked with commonly needed parts including filters, sensors, hoses, belts, and fluids. For less common components, we can source from our shop inventory or local suppliers and provide realistic timelines before work begins.
How quickly can you reach me on I-77 or US-421?
Response times vary by location. From our shop at I-77 & 421 Exit 272 or 267 in North Wilkesboro, we typically reach most I-77 corridor locations within 15 to 45 minutes, depending on your exact location, weather, and current call volume.
Get Help Now
A failed engine does not get better on its own, and the wrong decision in the first few minutes can turn a manageable repair into a major loss. Reid Diesel Enterprises is available 24/7 with real people answering the phone at every hour.
Call (336) 468-2323 or reach us through our contact page.
Reid Diesel Enterprises
967 Chambers Rd.
North Wilkesboro, NC 28659
I-77 & 421 Exit 272 or 267