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Fuel Injection technical support

Technical Resources

Holley EFI Manuals, Drawings, and Information
Holley EFI Wiring Manual

Holley EFI Wiring Manual

Holley EFI Introduction

Holley EFI Introduction

Holley EFI Pin Map Instructions

Holley EFI Pin Map Instructions

Holley EFI Quick Start Guide

Holley EFI Quick Start Guide

Holley EFI Base Calibrations

Holley EFI Base Calibrations

Holley EFI HP & Dominator Differences

Holley EFI HP & Dominator Differences

Holley EFI Injector Flow Data

Holley EFI Injector Flow Data

Holley EFI Sensor Diagnostics & Statuses

Holley EFI Sensor Diagnostics & Statuses

Holley EFI Updating Firmware Instructions

Holley EFI Updating Firmware

Holley Boost Control Manual

Holley EFI Boost Control Instruction Manual

Holley Boost Control Quick Start Guide

Holley EFI Boost Control Quick Start Guide

Holley EFI Datalogger Instructions for V3 software

Holley EFI Datalogger Instructions for V3 software. Some information in this manual will not apply to V2 and earlier software versions.

Traction Control - TC2 Manual

Traction Control - TC2 Manual

HP and Dominator EFI Component Selection Chart

Step by Step Component Selection Chart for HP and Dominator EFI Products

Gen III HEMI EFI Component Selection Chart

Gen III HEMI Specific Selection Chart for HP and Dominator EFI Products

Holley EFI 16 Injector Setup

Holley EFI 16 Injector Setup (8 Cylinder Engines) Setup of 8 Injectors in 8:2 Amp Peak and Hold Mode

Replacement Connector Guide

Single Pack Connector kits for all Holley EFI Main Harnesses

Holley EFI V4 Software
V4 Overview

DOWNLOAD AND READ THIS FIRST. Includes V4 updates and information

2016 PRI Seminar Example

This is the example calibration that was used during the Holley EFI V4 Advanced Features seminar at PRI 2016.

V4 Revision Log

Contains a list of updates to V4 software and firmware versions

Previous Holley EFI V4 Software and Firmware

Contains all previous V4 software versions (Build 30 and 32) in a zipped file. Compatible firmware is included in the software installer.

Holley V4 Software and Firmware

Contains latest V4 software (software version 4.0 Build 110). The compatible firmware (firmware version 4.0 Build 110) is included in the software installation. Changes include updates to run Holley EFI Coyote VVT Module, Drive-By-Wire updates, and other items. For specifics, the V4 Revision log.

Holley EFI V5 Software
Holley EFI V5 Software Overview

Holley EFI V5 Software Overview

Holley EFI V5 Revision Log

Contains a list of updates to V5 software and firmware versions

Holley EFI V5 Build 171 Updates

Updates for V5 versions Build 100 through 171

Holley EFI V5 Build 140 Complete File Set

Holley EFI V5 Build 140 Complete File Set - Include Software/Firmware and all Digital Dash or Handheld Firmware. Current production firmware shipping pre-installed in HP or Dominator ECU's.

Previous Holley EFI V5 Build 110

Contains previous V5 version (Build 110) compatible firmware is included in the software installer.

Holley EFI V5 Build 171 Complete File Set

Holley EFI V5 Build 171 Complete File Set - Include Software/Firmware and all Digital Dash or Handheld Firmware. Updated Canned and Custom Ignition Types.

Holley EFI V5 Handheld Contents

Handheld contents for Holley EFI V5 Firmware.

Previous Software Versions/Updates
Holley EFI Firmware

FINAL PRE-V2 FIRMWARE - Firmware must be installed with tuning software version 1.1.5 Build 3 located above. Read the "note" in the Holley EFI Firmware Changes document before performing firmware update.

Holley EFI Firmware Changes

Change log for pre-V2 firmware versions

Holley EFI Touch Screen Update

It is recommended that all Touch Screen users that purchased a Holley EFI touch screen before June 2011, and experience a battery drain over 2-3 weeks, install this update. Download these instructions.

Holley EFI ReloadPM Installer

It is recommended that all Touch Screen users that purchased a Holley EFI touch screen before June 2011, and experience a battery drain over 2-3 weeks, install this update. See "Touch Screen Update" instructions.

Holley EFI Software

V1.5.0.3. This is the last version of software before the V2 update. Do not update if your current software is 1.3. Contact Holley tech at 270-781-9741 if you have version 1.3.

Holley EFI V3
V3 Software Overview

DOWNLOAD AND READ THIS FIRST. Includes V3 updates and information. V3 is updates are not needed for most users.

Holley V3 Software

Contains latest V3 software

Holley V3 Firmware

Contains latest V3 firmware

Holley EFI V2 Sofware
Holley EFI V2 Instructions

IMPORTANT DOWNLOAD - These contain new instructions for V2 Installation, Features, Boost Control, and Traction Control

V2 Update Instructions

DOWNLOAD AND READ THIS FIRST- Follow these steps EXACTLY to update your Holley EFI system to the new V2 version.

Holley V2 Software

Contains latest V2 software.

Holley V2 Firmware

Contains latest V2 firmware.

Holley V2 Firmware Changes

Contains a list of updates to V2 firmware versions.

QFI
Quick Fuel ECU Dashboard Files

Quick Fuel ECU Dashboard Files version 1.4

Legacy EFI Software
Pro-Jection 4D/4Di Installation

Pro-Jection 4D and 2Di Installation Guide

Commander 950 TBI Manual

Commander 950 TBI Hardware Installation Manual

Pro-Jection 1D Manual

Pro-Jection 1D Installation Guide

Fuel Injection Tech Info

Technical Information for Fuel Injection

Fuel Injector Selection

Selecting A Fuel Injector

Commander 950 Software

Commander 950 software. Requires windows 98 or newer, not compatible with Windows Vista or Windows 7

Pro-Jection 4Di Tuning Software

Pro-Jection 4Di Tuning Software

Commander 950 Tuning Manual

Commander 950 Tuning Manual

Commander 950 Base Maps

Base Map downloads for the Holley Commander 950

See More

FAQ's

  • Question
    Are any of the systems (self tuning)?
    Answer
    The HP, Sniper, Avenger and Dominator systems have self tuning fuel strategy.
    Helpful?
  • Question
    Do you need a lap top to get the engine running?
    Answer
    The Terminator, Sniper and Avenger Systems include a hand held programmer. The HP and Dominator systems require a laptop. All of the system can be tuned from a PC with compatible software.
    Helpful?
  • Question
    Can I run a DBW (Drive by Wire ) Throttle body?
    Answer
    The Dominator has integrated drive by wire throttle body control. For GM, Ford Coyote and late model Hemi.
    Helpful?
  • Question
    Can I run a MSD type ignition with your EFI systems?
    Answer
    Yes capacitive discharge type ignition systems are compatible.
    Helpful?
  • Question
    Why should I choose Holley over another manufacturer?
    Answer
    There are other quality manufactures in the market place . Holley EFI systems offer flexibility and modular upgradability that is not offered by other manufactures. Our systems are broad spectrum and are used on everything from stock engine street rods to 4000+ HP pro-mods. The base ECU used in a Terminator is the same ECU used in Arce and in NHRA pro stock. The level of customer support we offer is unmatched in the industry from the quality of our tech support, Dealer network and end user training classes. Holley will be there after the sale.
    Helpful?
  • Question
    Will your EFI system plug into my factory wiring harness?
    Answer
    Unfortunately no, All of our systems utilize a stand alone harness.
    Helpful?
  • Question
    Are your injection systems emissions legal?
    Answer
    You will need to check local and state emissions regulations. Unfortunately due to the user tune ability of the systems the C.A.R.B. will not issue them an EO# at this time.
    Helpful?
  • Question
    Can I run E-85 or Methanol?
    Answer
    The HP and Dominator systems can be programmed for any concentration of gasoline, Ethanol or Methanol. However you need to make sure that the fuel system including your fuel injectors are compatible.
    Helpful?
  • Question
    Will your system control my factory transmission ABS brakes etc.?
    Answer
    The Dominator EFI has ability to run a GM 4L60E , 4L80E Ford AODE and 4R70W. HP and Dominator based ECU's can be programmed for TCC control on a 700r4 or 200r4.
    Helpful?
  • Question
    Are any of your systems sequential fire?
    Answer
    The HP and Dominator series of ECUs can be programmed for Sequential Fuel strategies. They will require a cam as well as a crank reference input.
    Helpful?
  • Question
    Do your systems offer boost control?
    Answer
    The HP and Dominator systems offer Turbo boost control.
    Helpful?
  • Question
    What type of injectors and how many can the system run?
    Answer
    The HP ECU can run up to 16, high or low impedance injectors. It can stage two sets on a 4 cylinder. The Dominator ECU can run up to 24 high or low impedance injectors. It can run three sets with one staged on a 6 or 8 cylinder. The Sniper EFI system will be offered in a 4 and 8 injector option.
    Helpful?
  • Question
    Does your system offer Nitrous control?
    Answer
    The HP ECU's have integrated Wet or Dry , Progressive and fixed NOS control for 4 stages, Dominator ECU's can support 8 stages.
    Helpful?
  • Question
    Can I run water meth?
    Answer
    Both the HP and Dominator systems have integrated water meth capabilities.
    Helpful?
  • Question
    The instructions say I need to wire the main power and ground wire directly to the Battery. Is that really that important and can I hook it up someplace else like a distribution lug, starter solenoid or kill switch?
    Answer
    Yes it is very important. Connecting them directly to the battery is one of the most important steps of the installation. Failure to follow any installation instructions as minor as they may seem can result in performance issues including damage that will not be covered under warranty.
    Helpful?
  • Question
    Does your system have traction control?
    Answer
    The Holley HP and Dominator ecu based systems support traction control when used in conjunction with a Holley specific module offered by Davis traction control.
    Helpful?
  • Question
    Will your system run DIS?
    Answer
    The HP has 8 channel outputs the Dominator has 10 channels . They are capable of driving "Smart" coils, Holley DIS coils or 2 wire high current "DUMB" coils with the addition of the 554-112 high current coil driver as well as Waste Spark applications.
    Helpful?
  • Question
    Do your systems support Transmission control?
    Answer
    All systems that include a Dominator based ECU can controll the following transmissions. ( GM = 4L60E, 4L65E, 4L80E ) ( Ford = 4R70W and AODE ).
    Helpful?
  • Question
    Will your EFI work with a turbo or other form of forced induction?
    Answer
    The HP and Dominator ecu's are compatible with 1- 9.9 Bar applications. The systems also has integrated boost control. Sniper EFI has a 2 bar integrated map sensor.
    Helpful?
  • Question
    Are Terminator, Sniper, Avenger , HP and Dominator systems narrow or wide Band?
    Answer
    They are all wide band systems. The Dominator is dual channel capable.
    Helpful?
  • Question
    Will your EFI system work with my Oddfire engine?
    Answer
    Currently we do not have an EFI system that has the ability to do timing control with unevenly spaced firing orders (odd fire). However, if you have an ignition system that has an RPM output, you can use our EFI for fuel control.
    Helpful?
  • Question
    What type of injectors and how many can the system run?
    Answer
    The HP ECU can run up to 16 high or low impedance injectors. It can stage two sets on a 4 cylinder. The Dominator ECU can run up to 24 high or low impedance injectors It can run three sets with one staged on a 4 or 6 cylinder. The Sniper EFI system will be offered in a 4 and 8 injector option.
    Helpful?
  • Question
    Where do I send my ECU to have it repaired?
    Answer
    Unfortunately we cannot repair the ECU because it is Potted. Potting the ecu provides several benefits. The down side is that a potted ECU cannot be repaired if it is damaged due to improper installation. Always read the instruction and follow proper installation procedures to avoid ECU damage. If you damage the USB port by pulling the cable out of the connector on the back of the ECU we may be able to repair it. Contact a tech service representative for more information pertaining to a damaged USB port.
    Helpful?

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