Holley EFI Ford Foxbody Main Harness

This harness is for fuel injected small block ford engines such as 5.0L or 5.8L Windsor powerplants. Plug and play ignition capability with Dual Sync and HyperSpark Distributors. The 5.0L Ford main harness is pre-terminated with Ford PWM IAC connector for the OEM PWM - idle air control motor commonly found on late 80's and early 90's engines. Compatible with Holley EFI Dominator, HP, and Terminator X and X Max ECU's.

Features:

• Designed for use with fuel injected small block ford engines
• Plug and play ignition capability with Dual Sync and HyperSpark distributors
• Compatible with Holley EFI Dominator, HP, and Terminator X and X Max ECU’s
• Comes pre-terminated with Ford PWM IAC connector for OEM PWM - idle air control motors
• For OEM Ford fuel injectors, use injector harness 558-209
• For TFI distributor applications, use ignition adapter 558-305

Specs:

• Brand: Holley EFI
• Category: Engine
• Emission Code: 4
• Grade Type: Performance
• Harness Application: Ford
• Harness Type: Main
• Part Type: Engine Wiring Harness
• Product Type: 5.0L Ford Main Harness
• Sub Category: Wire, Cable and Related Components
• Terminal Type: Pin

Tech Resources:

The following guide overviews all connections on the main harness. The main harness supports all the primary engine sensors, fuel and ignition for eight cylinder engines, the #1 wideband oxygen sensor, and the first four programmable input and output channels. There are two connectors for this harness designated as “J1A” (pin designations below that start with an A) and “J1B” (pin designations below that start with a B).

EFI Selection Chart

Instructions - 271r1252a.pdf

Instructions - 199r11957.pdf