CP3 Injection Pump Conversions
Diesel Engine Repair — Cheyenne, WY
The CP3 injection pump earned its reputation on the 2003–2018 Cummins: a simple, durable design that routinely outlives the truck around it. A CP4-to-CP3 conversion puts that proven pump on trucks that came from the factory with the failure-prone CP4, removing the single biggest fuel system risk on those engines.
TDC installs complete CP3 conversion kits with the tuning and hardware the swap requires. It's one of the most requested reliability modifications in the diesel world, and for good reason — it converts a known time bomb into a known quantity.
What's Included
- CP4-to-CP3 conversion kits installed complete
- The proven pump design from the 5.9/6.7 Cummins
- Removes the CP4's metal-contamination failure mode
- Supports stock and performance fueling
- Done right: hardware, plumbing and tuning accounted for
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.
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Frequently Asked Questions
How much does cp3 injection pump conversion 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 cp3 injection pump conversion?
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.