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Holley Quadrajet Sniper EFI - User Manual

Holley Quadrajet Sniper EFI
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Quadrajet Sniper EFI (550-867 Shiny, 550-868 Black, & 550-869 Gold)

Table of Contents

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Summary

General Safety Warnings

Introduction and System Requirements

Tools Required for Installation

Lists essential tools needed for the installation process.

Parts Identification

Throttle Body Installation

Step-by-step instructions for mounting the throttle body.

Oxygen Sensor Installation

Coolant Temperature Sensor Installation

Fuel System Connections

Sniper EFI Master Fuel System Install

Return Line Bulkhead Fitting Installation

Fuel Line Installation

Hose Assembly Instructions

Proper techniques for assembling fuel hoses and fittings.

Hose Assembly Best Practices

ECU Wiring Overview

Basic Wiring Installation

General Wiring Reference and Best Practices

Essential guidelines for clean power, ground sources, and wire routing.

Throttle Body Connections

Pigtail and Loose Wire Connections

Explains how to connect loose wires for power, ignition, and fuel pump.

Connecting the Touchscreen LCD

Steps to connect the 3.5" Touch Screen LCD display to the main harness.

Handling Unused Wires

Handling Unused Wires (Trim and Wrap)

Non-Timing Controlled Ignition Wiring

Coil (-) Input for Ignition Timing

Connects to the coil negative for RPM input without ECU timing control.

Ignition Box Tach Output (No Timing Control)

Connects to aftermarket CD ignition box tach output for RPM signal.

Non-Timing Controlled Ignition Wiring (CD Box)

Timing Controlled Ignition Wiring

MSD Magnetic Distributor Setup

Pre-installation requirements and overview for MSD distributors.

Distributor Removal Procedure

Steps to remove the distributor from the engine.

Distributor Lock Out and Vacuum Advance

Distributor Installation

MSD Distributor Wiring Diagrams

Holley Dual Sync Distributor Installation

Distributor Alignment Procedure

Clockwise Rotor Rotation Alignment

Counter-Clockwise Rotor Rotation Alignment

Holley Dual Sync Distributor Wiring

Sniper EFI HyperSpark Distributor Installation

Handheld Navigation and Screens

Handheld Graph Options

Explains different options for adjusting data on graph screens.

Initial EFI Setup and Calibration Wizards

Initial EFI Setup Wizard Steps

Initial EFI Setup Wizard (Steps 6-9)

Sensor Verification

Prestart Checklist and Startup Procedures

Ignition Timing Check

Throttle Blade Adjustment

System Setup and Ignition Configuration

Basic Tuning Overview

Basic Tuning: Target AFR and Acceleration Enrichment

How to adjust Target AFR and Acceleration Enrichment parameters.

Basic Tuning: Fuel Prime and Closed Loop

Settings for fuel prime and enabling/disabling closed loop operation.

Basic Tuning: Learn and Idle Speed

Controls for self-tuning (Learn) and basic idle speed adjustment.

Basic Tuning: Spark Settings

Adjusting ignition timing for idle, cruise, and wide open throttle.

System Tuning Options

System Tuning: Outputs (Fan Control)

Configuration of fan on/off temperatures and AC shutdown.

System Tuning: Engine and Sniper Setup

Setting engine parameters like cylinders, displacement, and system type.

System Tuning: Ignition and Static Timing

Configuring ignition type, rev limiters, and static timing.

Advanced Tuning Overview

Advanced Fuel Settings

Adjustments for coolant enrichment, acceleration fuel, cranking, and afterstart fuel.

Advanced Tuning: Closed Loop Operation

Configuration options for closed loop operation and sensor input.

Advanced Tuning: Learn and Idle Control

Adjusting learning functions and idle air control (IAC) parameters.

Advanced Tuning: IAC Speed and Startup

Configuring IAC motor speed and startup behavior.

Advanced Tuning: Idle Spark and Launch Control

Features for idle spark assist and launch control (2-step, retard).

Sniper EFI Monitor Overview

Monitor Channel Scaling

Customizing gauge scales and warning thresholds for data channels.

Custom Dash Configuration

Personalizing the display by configuring custom dash screens.

Tuning Definitions: Basic Fuel

Tuning Definitions: Fuel Enrichment and Prime

Tuning Definitions: Closed Loop, Learn, Idle, and Spark

System Tuning Parameters

System Tuning: Static Timing & Advanced Fuel

Advanced Tuning: Closed Loop and Learn

Advanced Tuning: Idle Control and Speed

Advanced Tuning: Launch Control and ECU Information

Super Sniper Features: Nitrous and Boost Control

Super Sniper Features: Advanced Tables

Datalogging and File Transfers

Configuration Management (Download & Load)

Laptop Support and Software Configuration

Viewing Datalog with Sniper EFI Software

Troubleshooting Guide and Sensor Verification

Sensor Status and Diagnostics

Holley Quadrajet Sniper EFI Specifications

General IconGeneral
BrandHolley
ModelQuadrajet Sniper EFI
CategoryAutomobile Accessories
LanguageEnglish

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