Engineered specifically for 2003 through 2018 Dodge Ram 2500 and 3500 trucks powered by the 5.9L and 6.7L 24-valve common-rail Cummins turbo diesel engine running dual high-pressure injection pumps, the Fleece Performance CP3X2 Dual CP3 Controller Wiring Harness (FPE-CP3X2) provides a seamless electronic control solution. Traditionally, dual-pump conversions relied on expensive, failure-prone piggyback electronic control boxes that splice into factory wiring to mirror the primary Fuel Control Actuator (FCA / MPROP) signals.

The Fleece CP3X2 harness eliminates external control boxes altogether by wiring both CP3 metering solenoids in parallel directly to the factory Cummins ECM. The factory ECM internal FCA driver is capable of delivering up to 5 amps (5,000 mA) of current, providing more than enough electrical capacity to drive two Fuel Control Actuators simultaneously. By adjusting the FCA current calibration tables in custom tuning software (such as EFILive or HP Tuners), the engine computer retains 100% direct command over common-rail fuel pressure, preventing idle hunting and delivering unmatched rail stability.

Key Features & Benefits

• Direct Factory ECM Fuel Control: Eliminates failure-prone standalone piggyback control modules, allowing the OEM Cummins ECM to regulate rail pressure directly.
• Cost-Effective Dual Pump Management: Provides an affordable alternative to complex $400+ aftermarket dual-pump electronic controllers.
• Factory Plug-and-Play Connectors: Assembled using OEM-grade weather-sealed Bosch connectors that click directly into factory and secondary CP3 FCAs without cutting or splicing stock wires.
• Heavy-Duty Braided Sleeving: Protected by high-temperature, abrasion-resistant braided loom to withstand high under-hood heat, vibration, and fluid exposure.
• Superior Rail Pressure Stability: Eliminates signal delays and calibration mismatches common with external interceptor modules under rapid throttle transitions.
• Zero Core Charge: Brand-new outright wiring component requiring no core deposit or core return.

Technical Specifications

• Manufacturer / Brand: Fleece Performance Engineering
• Manufacturer Part Number / SKU: FPE-CP3X2
• Alternative Part Numbers: FPECP3X2 / CP3X2
• UPC: 840171216509
• Product Type: Dual CP3 Parallel Electronic Control Wiring Harness
• Connector Style: Genuine Bosch 2-Pin Weather-Sealed Connectors
• Wiring Construction: High-Temperature Automotive-Grade Copper Wire with Braided Loom
• ECM Driver Capacity: Supports up to 5 Amps (5,000 mA) Continuous FCA Driver Output
• Truck Platform: 2003–2018 Dodge Ram 2500 & 3500
• Engine Platform: 5.9L & 6.7L 24V Cummins Common-Rail Turbo Diesel
• Core Requirement: None
• Warranty: Fleece Performance Engineering Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2003–2007 Dodge Ram 2500 / 3500 – 5.9L Cummins 24V Common-Rail Diesel
• 2007.5–2018 Dodge Ram 2500 / 3500 – 6.7L Cummins 24V Common-Rail Diesel
• Fits Model Years: 2003, 2004, 2004.5, 2005, 2006, 2007, 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
• ECM Tuning Calibration (Crucial): Custom tuning is required to drive dual pumps via the ECM. In common-rail CP3 systems, higher current results in lower fuel flow (zero current delivers maximum full flow).
  • EFILive Table Reference: Start by multiplying the stock FCA current table (D0787) by 1.6 to 1.7.
  • Higher lift pump idle pressures require increased amperage at the top of the table (low desired fuel flow) to prevent rail pressure overshoot at idle.
  • If the truck will not start after multiplying by 1.7, decrease the multiplier slightly until the truck starts cleanly and maintains target idle rail pressure.
  • Fine-tune the middle and lower areas of the table while data-logging to prevent pressure spikes or dips under acceleration.