Holley 4150 Sniper EFI Fuel Injection Installation Manual

Installation and setup manual for the Holley 4150 Sniper EFI TBI fuel injection system, covering throttle body, wiring, sensors, and calibration.


Holley 4150 Sniper EFI Fuel Injection Installation Manual - cover page
Brand
Holley
Category
Vehicle maintenance
Document type
Installation Guide
Language
English
Pages
82
File format
PDF
File size
5.6 MB
Published
13 October, 2026
Updated
13 October, 2026
MD5 checksum
1D5E1D18AA18C3CFD24A8F9B8BC4CF6B

About this manual

This manual provides instructions for the installation of the Holley 4150 Sniper EFI TBI fuel injection system. It details engine and fuel system requirements, lists necessary tools, and guides the user through parts identification and throttle body installation. Safety warnings regarding fuel vapors and the need for a trained mechanic are emphasized.

What's inside

  • Introduction & System Requirements
  • Tools Required for Installation
  • Parts Identification
  • Throttle Body Installation
  • Oxygen Sensor Installation
  • Coolant Temperature Sensor Installation
  • Fuel System Connections
  • ECU Wiring Overview
  • Basic Wiring Installation
  • System Setup and Tuning

Specifications

Engine Horsepower Range200 - 650
Cylinder Configuration4, 6 or 8 cylinder
Fuel Pressure Requirement60 psi
Fuel Flow Requirement50 gallon per hour
Fuel Pressure Check Range55 - 65 PSI

Frequently asked questions

Who should perform the installation?

Only a trained mechanic having adequate fuel system experience should perform the installation, adjustment, and repair.

What type of fuel does the system require?

The system requires unleaded fuel only.

What is the recommended fuel pressure?

The recommended fuel pressure on the inlet side is between 55 and 65 PSI.

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