TABLE OF CONTENTS
Introduction..................................................................................................................1-2
Tools and System Requirements ..................................................................................... 2
Fuel System Requirements .............................................................................................. 3
Primary Kit Components .................................................................................................. 4
Component Layout .......................................................................................................5-8
Main Harness Layout ...................................................................................................... 9
Wideband Oxygen Sensor Installation ............................................................................ 10
Checking Hood Clearance ............................................................................................. 11
Pro-Flo 3 Installation ................................................................................................12-14
Fan and A/C Trigger Installation .................................................................................... 15
Fan and A/C Trigger Diagram ........................................................................................ 16
Wiring w/ Pro-Flo Distributor & CDI Box ......................................................................... 16
Main Harness Schematic ............................................................................................... 18
Injector Firing Order Configurations ............................................................................... 19
Pro-Flo 3 EFI Setup Wizard Map Matrix ....................................................................20-23
OEM Firing Order .......................................................................................................... 23
Warranty ....................................................................................................................... 24
INTRODUCTION
Thank you for selecting the Edelbrock Pro-Flo 3 EFI system. This is an electronic fuel injection system intended for V8 engines originally
equipped with carburetors. The Pro-Flo 3 EFI system can be paired via bluetooth connection with an exclusive tuning software, E-Tuner,
which is available as a free app for most Android-based tablets and smartphones. The use of a laptop PC is not required for tuning. The
E-Tuner Android app will enable real-time system performance monitoring and fine tuning adjustments. The Pro-Flo 3 EFI system offers
you the most bang for your buck, along with out-of-the-box performance from a name you can trust....Edelbrock!
If you have any questions, do not hesitate to call our EFI Technical Support
at: (800) 416-8628, 7am-5pm PST, Monday-Friday.
E-TUNER SOFTWARE UPDATES
Edelbrock periodically releases improved versions of the E-Tuner app software. These updates can include improvements to preinstalled calibration maps, additional calibration maps and updates to the user interface to improve the overall functionality of the
software. It is recommended to check the Google Play Store or the Edelbrock website to verify that you have the most recent
version of the app.
IMPORTANT WARNINGS
Before beginning the installation, verify that all components are present in the box. Inspect each component for
damage that may have occurred in transit. If any parts are missing or damaged, contact Edelbrock Technical
Support at (800) 416-8628, not your parts distributor.
CAREFULLY STUDY AND UNDERSTAND ALL INSTRUCTIONS BEFORE BEGINNING THIS INSTALLATION.
NOTE: The installation can be accomplished using common tools and procedures. However, it is highly recommended to have a
solid understanding of automotive repairs and modifications, and be familiar with and comfortable working on your vehicle and your
vehicle's fuel system. If you do not feel comfortable working on your vehicle, it is recommended to have the installation completed by
a professional mechanic.
PROPER INSTALLATION IS THE RESPONSIBILITY OF THE INSTALLER. IMPROPER INSTALLATION WILL VOID ALL
MANUFACTURER’S STANDARD WARRANTIES AND MAY RESULT IN POOR PERFORMANCE AND/OR DAMAGE TO
THE ENGINE AND/OR VEHICLE.
WARNING: The Edelbrock E-Tuner Software is intended to be used as a hands-free tuning tool and gauge display. Any function that
requires prolonged attention should only be performed after coming to a complete stop. Distracted driving is extremely dangerous and
illegal in most states. If adjustments are to be made during driving, always stop the vehicle in a safe location before performing any
adjustments, or have a passenger perform the necessary adjustments. Please check with your local laws for legal mounting locations
in your vehicle.
02 SENSOR INSTALLATION
It is suggested that the 02 sensor bung be installed by a professional muffler shop prior to the installation of the Edelbrock Pro-Flo 3 EFI
system. DO NOT drive the vehicle with the 02 sensor unplugged, sensor damage will occur. An 02 sensor bung plug is provided for your
convenience. Refer to Page #8 for the 02 sensor installation procedure.
EMISSION CONTROLS
The Edelbrock Pro-Flo 3 EFI system will not accept stock emissions control systems. Check your local emissions laws for requirements
before installing the Pro-Flo 3 EFI system. This system is not legal for use on pollution-controlled motor vehicles.
FUEL REQUIREMENTS
Because the Pro-Flo 3 EFI system uses a wideband oxygen (02) sensor, unleaded fuel must be used at all times. Using leaded fuels
will damage the O2 sensor and void your warranty. If leaded fuel is present in your fuel tank, the tank must be drained and filled with
unleaded fuel. It is also recommended to have a full fuel tank before operating the vehicle (after the installation).
NOTE: E85 fuels are not compatible with any Pro-Flo 3 EFI systems.
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AUTOMATIC TRANSMISSION CHECK
For best performance, economy, and emissions, the transmission kick down and shift points must be checked before and after the ProFlo 3 EFI installation.
SPARK PLUG WIRES
High EMI suppression spark plug wires are necessary, do not use solid core spark plug wires. Resistor type spark plugs are necessary.
EXHAUSTS SYSTEM
For best results, headers are recommended. For the Self Tuning function to properly operate, the exhaust system must be completely
sealed from header flange surface at cylinders heads to tailpipe. The exhaust system should be completely inspected prior to
installing the Pro-Flo 3 EFI system. All gaskets and hardware should be replaced. All hardware torques should be checked on regular
bases.
CHARGING SYSTEM
The Pro-Flo 3 EFI System requires a constant battery voltage of 12.0 volts or greater to operate properly. Recommended battery
capabilities are: 1000Ca @32°F / 800Ca @0°F. The vehicle’s battery must be in good operating condition capable of maintaining a
proper charge at all times. Verify the vehicle’s charging system is operating properly and that the system voltage maintains 12.0 volts, or
greater, at all times. All chassis grounds must be tight and clean. A ground cable from the engine block to chassis should be employed.
All battery cables must be in good condition providing a clean tight connection to the battery.
BATTERY CHARGER PRECAUTIONS - PLEASE ADHERE TO THE FOLLOWING GUIDELINES OR DAMAGE TO ECU MAY OCCUR.
• Be sure the battery has a full charge prior to attempting to start the vehicle.
• Never use the “engine start or jump start” setting on a charger to start the engine.
• Do not set the battery charger above 10 amps when charging.
• Never turn on the ECU or attempt to start the engine with the battery charger is connected .
• Make sure the charger is not charging over 18.0 volts.
• If battery the battery is completely discharged, it is best to disconnect the negative terminal on the battery when
charging.
COOLING SYSTEM
The minimum temperature requirement for the thermostat is 180°F.
TOOLS AND SYSTEM REQUIREMENTS
Use the following checklist for items needed.
Wrench / Socket Set
7/8” Oxygen Sensor Socket or Equivalent
Pliers (channel locks and hose clamp)
Screwdrivers (Phillips and Flathead)
Gasket Scraper or Equivalent
Timing light
Shop Rags
Edelbrock Gasgacinch #9300
Loctite 598 OEM High Temperature Silicone Gasket (O2
Sensor Compatible)
Vehicle Wiring Diagram (if available)
Thread Sealer
High-Heat Anti-Seize Compound
180°F Thermostat
Resistor Type Spark Plugs (Use correct heat range for your
particular application)
High EMI Suppression Spark Plug Wires (DO NOT use solid
core spark plug wires)
EFI Fuel System (See fuel system recommendation)
Mechanical Fuel Pump Block Off Plate (Except for vehicles
running a Fuel Sump System #3605, 3606, 3607 & 36052)
Fuel fittings (Additional fittings may be required depending on
routing preferences. Visit www.russell.com)
Fuel Pressure Sensor Edelbrock #3546 (Optional)
30 AMP Automotive Relay (If using electric fans and or A/C
Kick up - One relay required for each accessory)
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FUEL SYSTEM REQUIREMENTS
PRO-FLO 3
FUEL RAIL
FUEL
FILTER
LOW PRESSURE
HIGH PRESSURE
TO EFI FUEL RAIL
FUEL TANK
FUEL
FILTER
MUST BE LOWER THAN
LOWEST POINT OF FUEL TANK
FUEL PUMP
RETURN LINE
FUEL PUMP MUST BE
WITHIN 3’ OF FUEL TANK OUTLET
FUEL
FILTER
LOW PRESSURE (7 PSI MAX)
HIGH PRESSURE (58-60 PSI)
TO EFI FUEL RAIL
HIGH PRESSURE (58-60 PSI)
LOW PRESSURE
FUEL TANK
VENT TUBE (90° QUICK CONNECT)
ROUTE TO CHARCOAL CANISTER,
FUEL TANK VENT (if equipped),
or BACK TO THE FUEL TANK
(fuel tank must have a vent or use a vented cap)
FUEL PUMP POWER CONNECTION
CONNECT TO FUEL PUMP
CONNECTOR ON MAIN HARNESS
FUEL
FILTER
MECHANICAL
FUEL PUMP
EDELBROCK FUEL SUMP
(PLASTIC)
(STEEL)
PRO-FLO 3
FUEL RAIL
The Pro-Flo 3 EFI system requires a high pressure fuel system providing 43-45 or 58-60 psi of fuel pressure with a flow rating of 57 GPH
(215 liter/hr). If you purchased a kit without a fuel system, the following recommended options are available separately.
NOTE: Refer to pages 20 – 22, PRO FLO 3 EFI SETUP WIZARD MAP MATRIX, for available Engine Calibration I.D and system configurations.
Part Number 3604: Return-Style Fuel System: Can use any fuel pump with a minimum flow rating of 57 GPH (215 liter/hr). Fuel
pressure must be regulated to 43-45 or 58-60 psi.
MAX HP
475 29 43-45
550 29 58-60
550 35 43-45
625 35 58-60
800 60 42-45
INJECTOR
SIZE
REQUIRED
FUEL PSI
Part Number 3605: Universal EFI Fuel Sump System: Is provided with an internal 67 GPH (255 Liter HR) high pressure fuel pump and
regulator. Fuel pressure is regulated to 58-60 psi.
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Item P/N QTY. Description
1 Various 1
2 37-3605 1 7” Tablet (if applicable)
3 37-3604 1 Oxygen Sensor
4 22-3220 1 Pro-Flo 3 R1e ECU
5 Various 1 Pro-Flo 3 Distributor
6 37-0110 1 Bluetooth Antenna
7 8041 1 Throttle & Trans Kick Down
8 37-1549 1 Car Charger w/ USB Cable
9 Various 2 Intake Manifold Gasket
Pro-Flo 3 Manifold Assembly
(4150 Style manifold shown)
PRIMARY KIT COMPONENTS
(Images are for reference only and may not represent actual components.)
Item P/N QTY. Description
1 36-3505 4 Sheet Metal Screw
2 38-0590 1 Throttle Return Spring Bracket
3 40-3970 1 1/2” to 3/8” Pipe Reducer
4 52-8097 1 Oxygen Sensor Bung Plug
5 52-9710 1 Oxygen Sensor Bung
6 72-1519 8 Neoprene Rubber Washer
7 74-4920 1 Throttle Return Spring
8 37-3499 1 Harness, Ignition Coil
37-
9
91156
10 37-3518 1 Sensor, MAT
11 37-1620 1 Main Engine Harness
12 78-2004 10 11” Tie Wraps
13 37-3496 1
3 10” Pigtail w/ Contact Crimp
Distributor Extension Harness
(Ford and some Chrysler Only)
⑥
(Images are for reference only and may not represent actual components.)
Not Pictured
MAIN HARDWARE
④① ② ③
⑦
⑤ ⑥
⑨
⑧
⑩
⑪
⑫
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PRO-FLO 3 4150 STYLE MANIFOLD - COMPONENT LAYOUT
The Edelbrock Pro-Flo 3 EFI system delivers fuel and air to the engine via an induction system consisting primarily of a 4-barrel throttle
body, dual fuel rails, and eight fuel injectors. The induction system is fully assembled, tested, pressure checked, and flowed at the
Edelbrock Factory in Torrance, California. Avoid disassembling these components if possible.
NOTE: ALL UNUSED VACUUM PORTS MUST BE
CAPPED TO AVOID VACUUM LEAKS
4-BARREL THROTTLE BODY
The Pro-Flo 3 system uses a 4150 style flanged
throttle body with four throttle blades arranged in
a conventional 4-barrel pattern. The air valve can
flow up to 1000 CFM.
3/8” PCV PORT
Full Time Vacuum
(NOT FOR FUEL)
*P/N 3220 SHOWN
FUEL INPUT
-6 AN Male
COOLANT
TEMP SENSOR
FUEL INJECTORS
The Pro-Flo 3 EFI system uses
pintle-type, fuel injectors.
THROTTLE & TRANS
KICK-DOWN BRACKET
FUEL RAILS
The extruded aluminum fuel rail
assemblies distribute the high
pressure fuel to the injectors.
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PRO_FLO 3 4150 STYLE MANIFOLD - COMPONENT LAYOUT
3/8” PCV PORT
Full Time Vacuum
(NOT FOR FUEL)
IDLE AIR CONTROL (IAC)
VALVE
THROTTLE POSITION
SENSOR (TPS)
*P/N 3220 SHOWN
MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR
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PRO-FLO 3 XT MANIFOLD - COMPONENT LAYOUT
The Edelbrock Pro-Flo 3 XT EFI system delivers fuel and air to the engine via an induction system consisting primarily of a traditional
90mm throttle body, dual fuel rails, and eight fuel injectors. The induction system is fully assembled, tested, pressure checked, and
flowed at the Edelbrock Factory in Torrance, California. Avoid disassembling these components if possible.
NOTE: ALL UNUSED VACUUM PORTS MUST BE
CAPPED TO AVOID VACUUM LEAKS
*P/N 32273 SHOWN
IDLE AIR CONTROL (IAC)
VALVE
90mm THROTTLE BODY
The Pro-Flo 3 XT system uses a traditional
90mm throttle body. The air valve can
flow up to 1100 CFM.
FUEL RAILS
The extruded aluminum fuel rail
assemblies distribute the high
pressure fuel to the injectors.
THROTTLE POSITION
SENSOR (TPS)
COOLANT
TEMP SENSOR
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