LT1 Engine Harness for Holley EFI

The EFI Connection 100-05000 is a direct-fit engine harness engineered specifically for 1993-1997 Camaro and Firebird vehicles equipped with an LT1 engine and a Holley EFI ECU (HP, Dominator, Terminator X, or Terminator X Max). This harness is designed to integrate seamlessly with the vehicle's original wiring, connecting to body-side harness connectors like C100, C105, C210, C220, and C230, avoiding the excessive length issues found with standard Holley harnesses. This engine harness features integrated EV1 injector wiring, eliminating the need for a separate injector sub-harness. It includes specific wiring for the crank sensor within the timing cover, the cam sensor within the timing cover, the LT1 MAP sensor, the LT1 knock sensor, TPS wiring, electric fan operation, starter crank, oil pressure gauge, coolant temperature gauge, and oil level switch. All splices are ultrasonically welded for durability, and the harness utilizes production tooling for manufacturing. Installation is straightforward, described as plug-and-play with the LT1 engine. However, several considerations are necessary for full functionality. Instrument cluster speedometer and tachometer support may require a Dakota Digital SGI-5E or SGI-8E module, respectively. Holley HP and Terminator X ECUs are not compatible with the Camaro Firebird's two-wire VSS; 4L60E and two-wire VSS support require a Holley Dominator or Terminator X Max ECU. Additionally, ECU control of air conditioning, reverse lockout solenoid (T56), and EVAP purge solenoid will require the use of available inputs/outputs. This harness requires the engine to be equipped with a crank and cam signal conversion compatible with Holley EFI ECUs, specifically assuming an EFI Connection 24x/1x crank/cam signal conversion. Adapter harnesses are available for other conversion types.