Quick answer
Fogg’s Automotive Fleet & Service Center in Scotia, NY, minutes from Schenectady, services light and medium-duty diesel — Power Stroke, Duramax, Cummins, and Isuzu — for fleets and one-truck owners alike. Diesel diagnostics run $95–$200 and credit toward the repair; we handle DEF/DPF regeneration faults, EGR, injectors, fuel systems, cold-start problems, and the brakes and suspension that hauling wears.
What’s included
- Full-system diesel diagnostics with live data — DPF soot load, DEF/SCR, NOx, EGR, boost
- Forced regeneration, DPF cleaning, and DEF dosing-system repair
- EGR valve and cooler service; NOx and differential-pressure sensor replacement
- Fuel filter and water-separator service on interval; injector and high-pressure pump work
- Glow plug, intake heater, block heater, and dual-battery testing before winter
- High-capacity oil service, HD coolant, towing-schedule transmission and axle fluids
- Towing-grade brake, bearing, and suspension work; NYS inspection on the same visit
Signs you need this
- Check engine or DEF/DPF warning with a countdown or derate message
- Regeneration cycles that never seem to finish on short routes
- Hard starts, long cranks, or white smoke on cold mornings
- Noticeable fuel-economy drop or black smoke under load
- Limp mode or reduced power while towing
- Water-in-fuel light on, or coolant loss with no visible leak (EGR cooler)
The full guide
A working diesel cannot sit in a specialty shop’s queue for two weeks, and in the Capital Region it does not have to.
We service the light and medium-duty diesels that tow, plow, haul, and deliver across the Capital Region — Ford 6.7 and 3.0 Power Stroke, GM 6.6 and 3.0 Duramax, Ram 6.7 Cummins in 2500 through 5500, Mercedes diesel Sprinters, and Isuzu 4HK1-powered NPR cab-overs — with scan platforms that speak their control modules fluently and 27 bays so a truck is diagnosed the day it arrives.
Read the full guideShow less
Modern diesel problems are mostly emissions-system problems. The particulate filter needs sustained exhaust heat to regenerate, and a van running short Scotia-to-Rotterdam routes never gets it, so soot climbs, regens get interrupted, and the truck ends up in a derate countdown.
DEF quality faults, failed NOx sensors, and EGR coolers packed with carbon round out the list.
We diagnose from live data — soot load, differential pressure, NOx upstream and downstream, EGR position — instead of replacing $800 sensors on a guess, and we tell you plainly which repairs are compliance you cannot defer and which are maintenance you can schedule.
We will not do a DPF or EGR delete: it is a federal violation, it voids the warranty, and a deleted truck is a liability on a fleet account.
Fuel systems are the second front. High-pressure common-rail pumps and injectors do not tolerate water or dirt, so fuel filters and water separators are a hard interval here — every 15,000–22,500 miles depending on engine — and a water-in-fuel light is a same-day appointment.
Cold-start is its own discipline in this climate: glow plugs and intake heaters tested every fall, block-heater cords checked, batteries load-tested in pairs, and a straight conversation about winter fuel blends and anti-gel treatment before the first week of single-digit mornings on the Mohawk.
Then the working-truck fundamentals: 12–15 quart oil services on the diesel’s interval, HD coolant tested for freeze point, Allison, Aisin, and 10R140 transmission fluid on a towing schedule, and brakes, bearings, and suspension sized to what the truck pulls up the Northway grades.
Every measurement goes on the unit’s record, so a fleet manager — or an owner-operator with one truck — can see the wear trend and plan the spend.
Diesels over 8,500 lbs get a safety-only New York State inspection in Schenectady County; lighter diesels get the OBD-II test, where an emissions fault fails the sticker.
Also for one vehicle
Also for one truck: the plow contractor with a single Super Duty gets the same live-data diagnosis, the same fall cold-start check, and the same published diagnostic fee — a diesel that won’t start in January is downtime whether you own one truck or forty.
Start a fleet accountCommon questions
Do you work on diesel pickups, or only fleet trucks?
Both, and the work is identical. Owner-operators with one Power Stroke, Duramax, or Cummins get the same technicians, live-data diagnostics, and published $95–$200 diagnostic fee as a fleet of thirty; heavy trucks beyond our lift capacity we refer honestly.
Why does my diesel keep trying to regen?
Short trips are the usual culprit — the DPF needs sustained exhaust heat to burn off soot, and a route of two-mile hops around Schenectady interrupts the cycle every time. Sometimes it’s a stuck differential-pressure sensor or an EGR problem masquerading as a soot issue.
Live data tells us which, and the fix may be a scheduled forced regen rather than a new filter.
My DEF warning shows a countdown — how urgent is it?
Urgent. Once the countdown reaches zero, federal emissions logic limits the truck to low speed until the fault is fixed — not a shop policy, the law baked into the software.
Bring it in with mileage to spare and we’ll diagnose whether it’s fluid quality, a NOx sensor, the pump, or the dosing injector. Fleet units with a countdown go to the front of the line.
Will a DPF or EGR delete pass the New York State inspection?
We don’t do deletes, and you shouldn’t buy a truck that has one. Removing emissions equipment is a federal violation regardless of weight class.
On diesels under 8,501 lbs the OBD-II inspection fails it outright; heavier diesels get a safety-only inspection in Schenectady County, but a deleted truck still carries the federal exposure and voids the powertrain warranty.
