Diesel Fuel System Diagnostics
Diesel Engine Repair — Cheyenne, WY
Modern common-rail diesel fuel systems run at extreme pressures with tight tolerances, and when something's wrong — hard starts, long cranks, low power, derates, or fuel dilution in the oil — the parts involved are expensive enough that guessing is not an option. Trevor tests the system stage by stage: supply from the tank, lift pump pressure, injection pump output, rail pressure, and injector balance.
That testing determines whether you need a $60 filter, a lift pump, an injector set, or an injection pump — very different repair bills. And if your truck runs a failure-prone CP4 pump, Trevor can talk you through disaster prevention kits and CP3/DCR conversion options that protect the whole system.
What's Included
- Lift pump, injection pump and rail pressure testing
- Injector balance and return-flow testing
- Hard start, long crank and derate diagnosis
- Fuel dilution and contamination inspection
- Honest repair options at every price point
Diesel Diagnosis Done Right
- Verify and inspect
Every diesel complaint starts with reproducing the symptom and a physical inspection — leaks, soot trails, boots, clamps and wiring.
- Test the systems
Compression tests, fuel system diagnostics and turbo checks isolate whether the problem is mechanical, fuel, or air.
- Confirm before replacing
Injectors, pumps and turbos are expensive. Nothing gets replaced until testing confirms it failed.
- Fix it for the long haul
Where a known weak point exists — like CP4 injection pumps or grid heater bolts — Trevor will tell you about the proven prevention options.
Related Diesel Repair Services
Frequently Asked Questions
How much does fuel system diagnostics cost at TDC Automotive?
Labor is billed hourly at $135/hr, and you'll get findings and an estimate before repair work begins. Call (307) 996-0980 with your year, make and model and Trevor can give you a realistic idea of what's involved.
Do I need an appointment for fuel system diagnostics?
Call ahead at (307) 996-0980 — as an owner-operated shop, TDC schedules work so your vehicle gets Trevor's full attention rather than sitting in a lot for a week.
Where is the shop, and what area do you serve?
The shop is at 8407 Aztec Drive in Cheyenne, Wyoming, and serves all of southeast Wyoming plus the Nebraska panhandle and Northern Colorado — customers regularly drive in from Laramie, Wheatland, Torrington, Pine Bluffs, Wellington, Fort Collins and Greeley.