FuelTech FT450/550 4 Cylinder Universal A Harness - 2002006505
Plug and Play 4 Cylinder Harness for FT450 and FT550 Systems
The FuelTech 4 Cylinder Universal A Harness is a versatile, plug and play wiring solution designed for 4-cylinder performance builds using the FuelTech FT450 or FT550 ECU. Built to simplify installation while maintaining flexibility, this harness is ideal for both street and race applications.
Pre-configured for 4 injectors and 4 individual smart coils, this harness supports semi-sequential fuel injection and wasted spark ignition right out of the box. For full sequential operation, the FT550 ECU paired with the optional 4 Cylinder Universal B Expansion Harness is required.
Flexible Fuel and Ignition Compatibility
This harness is designed to work with a wide range of injector and ignition setups, making it adaptable to different engine builds and configurations.
- Supports 4 EV1 injectors
- Compatible with 4 smart coils
- Semi-sequential injection and wasted spark ignition
- Full sequential capability with FT550 and B Expansion Harness
- Compatible with high and low impedance injectors
Ready for High and Low Impedance Injectors
The harness supports both injector types, allowing you to tailor your setup based on your build requirements.
- Low impedance injectors require FuelTech Peak and Hold driver (sold separately)
- High impedance injectors require Peak and Hold jumper harness (included)
- Pre-wired for use with FuelTech Peak and Hold external drivers
Pre-Wired Sensor Integration
Designed for ease of installation, this harness comes pre-wired for essential engine sensors and monitoring systems.
- FuelTech WB-Nano O2 ready (Bosch LSU 4.2 sensor compatible)
- GM-style intake air temperature sensor ready
- GM-style engine coolant temperature sensor ready
- 2 pressure sensor inputs for fuel, oil, or 0-5V sensors
- Crank and cam sensor connectors (VR and Hall effect supported)
Expandable Output and Control Capabilities
The harness includes additional output capability, allowing for expansion and control of auxiliary systems.
- Extra output connector for custom applications
- Supports control of auxiliary components and accessories
- Configurable outputs for performance and race functions
Integrated Power and Durable Construction
Built for reliability, this harness includes dedicated power control and durable materials for long-term performance.
- Includes 3 relays with built-in fuses
- Separate power circuits for electronics, injectors, and coils
- Requires Blue#6 output configured as fuel pump or RPM activation to trigger relays
- Labeled connectors for easy installation
- Heat, moisture, and oil-resistant insulation
Important Compatibility Notes
This harness is designed as the primary harness for FT450 systems. When used with an FT550 ECU, additional expansion is required to unlock full functionality.
- Fully compatible with FT450 ECU as a complete solution
- Requires 4 Cylinder Universal B Expansion Harness for full FT550 functionality
Features
- Plug and play universal harness for 4-cylinder applications
- Compatible with FuelTech FT450 and FT550 ECUs
- Supports semi-sequential injection and wasted spark ignition
- Expandable to full sequential with FT550 and B harness
- Pre-wired for essential sensors and wideband O2
- Compatible with high and low impedance injectors
- Integrated relays and fused power distribution
- Durable construction for high-performance environments
Quick Specs
- Brand: FuelTech
- Product Type: Universal Wiring Harness
- Application: 4-cylinder engines
- ECU Compatibility: FuelTech FT450 and FT550
- Injector Support: 4 EV1 injectors
- Ignition Support: 4 smart coils (wasted spark)
- Wideband Support: FuelTech WB-Nano (Bosch LSU 4.2)
- Sensor Compatibility: GM-style temperature and pressure sensors
- Relays: 3 with built-in fuses
- Part Number: 2002006505
FAQs
Can this harness run full sequential injection?
Yes, but only when used with a FuelTech FT550 ECU and the 4 Cylinder Universal B Expansion Harness. On its own, it supports semi-sequential injection.
Does this harness support both high and low impedance injectors?
Yes, it supports both. Low impedance injectors require a Peak and Hold driver, while high impedance injectors use a jumper harness.
Why Buy from Beefcake Racing?
Beefcake Racing is your trusted source for FuelTech ECU systems, wiring solutions, and performance electronics. We help builders get their setups dialed in with the right components and expert support.
From standalone installs to full race builds, we offer fast shipping, real-world experience, and unmatched customer service.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
