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INTRODUCTION: 

 
Holley Performance Products has written this manual for the installation of the 

Commander 950 Auxiliary Injector Driver 

Module

.  This manual contains all the information needed to install this system.  Please read all the 

WARNINGS, NOTICES, 

NOTES, 

and 

TIPS

, as they contain valuable information that can save you time and money.  It is our intent to provide the best 

possible products for our customer; products that perform properly and satisfy your expectations.  Should you need information 
or parts assistance, please do not return the unit to the store without first contacting technical service at 1-270-781-9741, 
Monday through Friday, 7 a.m. to 5 p.m. Central Time.  By using this number, you may obtain any information and/or parts 
assistance that you may require.  Please have the part number of the product you purchased when you call. 

 

Warnings, Notes, & Notices: 

 

WARNING! 

As with all electronic devices, when welding on the vehicle, always remove both the positive and negative leads of the 

Commander 950 

system from the battery, and remove the Module from the vehicle.  This will help prevent damage to 

the system’s electronic control units. 

 

WARNING! 

Always turn the ignition switch “off” before connecting or disconnecting any wiring of the Commander 950 system.  

Failure to turn the switched power “off” may result in damage to the Commander 950 system. 

 

WARNING! 

The Commander 950 system is not waterproof.  Do not submerge, splash, or otherwise have the unit come in contact 

with water, or damage to the Commander 950 ECU or vehicle may result. 

 

WARNING! 

Do not use any non-Holley devices that alter the pickup signal to the 

Commander 950 Fuel Injection ECU

, (i.e. timing 

retard modules, external over-rev modules, etc.).  Use of any non-Holley device with the Commander 950 system may 

result in damage to the system.

 

 

OVERVIEW: 

 
The 

Commander 950 Auxiliary Injector Driver

 provides the additional drive capabilities needed when running 8 low-

impedance injectors.  The Commander 950 has four 4:1 peak-and-hold injector drivers. This type of driver is required to operate 
low-impedance injectors and one driver is required for each injector, however, this same type of driver can drive two high-
impedance injectors that are connected in parallel.   
 
Below are steps to follow to get you started in the right direction and to help you understand this manual. 
 
Before installing the system you must get to know the system by reading the manual and determine if any optional parts are 
needed.

  

 

What this kit is designed for:   

 

This unit is designed for systems using 8 low-impedance port fuel injectors or two 4 barrel Throttle Body Injection (TBI) systems.    

 

AUXILIARY INJECTOR DRIVER MODULE INSTALLATION:

 

 

Module Installation: 

 
1. 

Disconnect both the negative (-) and positive (+) battery cables at this time.  

If you disconnect any other wiring, label it.  

This includes all accessories! 

 

2.  Disconnect the five-wire injector connector from either the throttle body or the port injector adapter harness.  
 
3. 

Determine the mounting position of the Auxiliary Injector Module. 

 

 
4. 

The module can be mounted on the firewall in the engine compartment, provided that it is away from the direct 
heat from the headers.  

 

 
5.  Using the Auxiliary Injector Module as a template, mark and drill 4 holes at the mounting location. 

 

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