Holley 550-869 Installation Manual
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Holley 550-869 Installation Manual

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 Quadrajet Sniper EFI (550-867 Shiny, 550-868 Black, & 550-869 Gold)
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Summary of Contents for Holley 550-869

  • Page 1  Quadrajet Sniper EFI (550-867 Shiny, 550-868 Black, & 550-869 Gold)
  • Page 2 Individual service items are available for replacement of components. If assistance is required or if you need further warranty clarification, please call Holley Technical Service at 1 (270) 781-9741.

  • Page 3: Table Of Contents

    Timing controlled ignition sysyem wiring ............................... 22 Timing Control Preface: ............................22 MSD (Magnetic) Distributor [Timing Control] ......................22 Holley Dual Sync Distributor [Timing Control] ......................27 Sniper EFI HyperSpark Distributor [Timing Control] ....................33 Handheld Navigation ..................................... 34 Possible Screens ..............................34 Initial EFI Setup .....................................
  • Page 4 Fuel Prime ................................46 Closed Loop Enable/Disable ............................ 46 Learn Enable/Disable ............................... 47 Basic Idle .................................. 47 Spark ..................................48 System Tuning ....................................... 48 Outputs ..................................48 Engine Setup ................................50 Sniper Setup ................................50 Ignition Setup................................51 Static Timing ................................51 ADVANCED TUNING ....................................

  • Page 5: Introduction & System Requirements

    INTRODUCTION & SYSTEM REQUIREMENTS Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. This basic manual contains the information necessary for the installation of the throttle body, wiring, and sensors. Please read all the WARNINGS and NOTES, as they contain valuable information that can save you time and money.

  • Page 6: Throttle Body Installation

    PARTS IDENTIFICATION ITEM # IMAGE DESCRIPTION SERVICE P/N NOTES  Use of leaded fuel will degrade sensor. Prolonged will require periodic Bosch Wide Band replacement. 554-155 Oxygen Sensor  Mounting procedure below is critical for system performance  Requires 3/4” hole to be drilled ...
  • Page 7 Throttle Linkage/Bracket Side View Reconnect the throttle and if applicable transmission kick-down linkage. Be sure to check for any binding conditions and correct before proceeding. Poorly routed throttle cables & linkages can cause throttle pedal issues. Reconnect the appropriate vacuum hoses to the Sniper EFI throttle body. Be sure to plug any vacuum sources not used on both the Sniper EFI Throttle Body and on the Engine.
  • Page 8 NOTE: Verify that the O2 cable is supported correctly and away from heat sources such as the exhaust. If the O2 cable has melted it is not something fixed under warranty and will require the unit to be sent back to Holley to be repaired at customer cost.

  • Page 9: Coolant Temperature Sensor Installation

    Figure 3 Figure 4 Figure 5 NOTE: Never run the engine with the oxygen sensor installed if it is not plugged in and powered by the ECU, or it will be damaged. If you need to plug the hole temporarily, use an O2 sensor plug or a spark plug with an 18mm thread. COOLANT TEMPERATURE SENSOR INSTALLATION Install the Coolant Temperature Sensor into a 3/8”...

  • Page 10: Fuel System Connections

    FUEL SYSTEM CONNECTIONS Connect fuel feed and return hose. The Sniper EFI needs to be fed with 58 PSI of fuel pressure. This must be accomplished with an EFI fuel pump and bypass fuel pressure regulator. We recommend placing the fuel pressure regulator after the Sniper EFI throttle body like shown in the Fuel System Plumbing Overview Diagram.

  • Page 11: Sniper Efi Master Fuel System Install

    Fuel Pump and Filter Installation NOTE: If you have dual fuel tanks, you must purchase Holley PN 534-38. The following section covers the installation of the in-line pump as well as the pre and post filters. The fuel pump MUST be mounted lower than the lowest part of the fuel tank, and as close to the tank as possible.

  • Page 12: Return Line Bulkhead Fitting Installation

    Figure 3. The item numbers from section 1.1 are referenced. DANGER! IF DRILLING INTO TANK (RATHER THAN SENDING UNIT), HOLLEY RECOMMENDS HAVING YOUR TANK PROFESSIONALLY CLEANED BEFORE DRILLING. IF YOU CHOOSE NOT TO HAVE THE TANK PROFESSIONALLY CLEANED, DRAIN THE TANK COMPLETELY, LET DRY, AND FILL WITH WATER.

  • Page 13: Fuel Line Installation

    Slide hose clamp (Item 5) over fuel cuff and fitting and tighten to secure. Screw fuel cuff assembly to bottom of bulkhead nut and snug with a wrench. Ensure bottom of cuff will be submerged in fuel as shown in Figure 3. Cuff can be trimmed if necessary. Fuel Line Installation With the fuel pump, filters, and bulkhead fitting all in place.

  • Page 15: Ecu Wiring Overview

    ECU WIRING OVERVIEW The Sniper EFI throttle body comes with sensors pre-wired for easy installation. The illustrated diagram below is intended as an overview of how the system should be wired. Remember, the main ECU power and ground must be connected directly to the battery AFTER all other wiring installation has been performed.

  • Page 16: Basic Wiring Installation

    Used to drive an aftermarket tachometer Digital Gauge Output Used to drive Holley EFI analog gauges via 554-130 Gauge Module Touch Screen LCD Display – This small 4 pin CAN connector plugs into the Handheld Touch Screen display unit. Replacement 3.5” Touch Screen Handheld part number is 553-115.

  • Page 17: Throttle Body Connections

    Throttle Body Connections 7 pin Connector – Connects to the included 558-490 main harness. 10 pin Connector (optional) – Connects to included 558-491 I/O harness. Touch Screen LCD Display – This small 4 pin CAN connector plugs into the 3.5” Handheld Touch Screen display unit. Coolant Temperature Connector –...
  • Page 18 UNUSED WIRES As you finish the installation of your Sniper EFI you will likely have unused wires. These wires need to be properly taken care of before installation is considered complete or you may end up with problems down the road. You have two options on how to properly handle these wires.
  • Page 19 Option 2: Trim and Wrap Wire Required tools: Wire cutters Adhesive heat shrink tubing Heat source (heat gun or other) Procedure Disconnect the battery terminals. Cut the end of the wire so that there is no bare copper showing. NOTE: Make sure you leave enough length on the wire that you will have room to crimp or solder it at a later date should the need arise.

  • Page 20: Non Timing Controlled Ignition System Wiring

    NON TIMING CONTROLLED IGNITION SYSTEM WIRING Coil (-) [no timing control] This Yellow wire marked “Coil-” is an RPM input wire used for the following applications:  A stock type mechanical advance distributor with a stock inductive ignition coil. Examples of this would be any older style points distributor.
  • Page 21 OPTION 2 WIRING “Tach Out”: CAUTION! NEVER connect any of the EFI wires to the coil on any CD type ignition system. The ECU will be permanently damaged! NOTE: Using this input, the EFI will NOT control the ignition timing of the engine. The timing will be based on the distributor initial, mechanical, and vacuum advance, just like it did with a carburetor.

  • Page 22: Timing Controlled Ignition Sysyem Wiring

    Holley recommends that those who wish to use the Sniper’s timing control feature first get the engine running without timing control. Splitting the timing control into a secondary process will add very little time to the total install, but could significantly help with trouble shooting, should it be needed.
  • Page 23 Distributor Lock Out Procedure Remove the rotor from the distributor. Remove the advance components including the springs, weights, lock nut, and the advance stop bushing from the advance assembly. Remove the roll-pin from the drive gear and then remove the gear from the housing shaft. Slide the shaft up approximately two inches out of the housing.
  • Page 24 Connect the 2 wire connector on the distributor to the matching connector on your Sniper EFI power harness. Connect the white points output wire either to the Holley coil driver module or the Points input wire on your ignition box. Refer to the following wiring diagrams to complete the wiring.
  • Page 25 For additional and alternative instructions on how to setup a Sniper EFI using a magnetic distributor, please reference this helpful video. https://www.youtube.com/watch?v=oBSiyeg4XCU&feature=youtu.be...
  • Page 26 MSD (Mag) Distributor w/ Direct Drive Coil MSD (Mag) DISTRIBUTOR W/ CAPACATIVE DISCHARGE BOX (Such as MSD 6AL)

  • Page 27: Holley Dual Sync Distributor [Timing Control]

    Sniper installations utilizing timing control. NOTE: It is recommended that you use a Holley Dual Sync distributor if you are using a Hall Effect input for your rpm signal. However, Sniper EFI will accept a 1x per fire hall effect signal from other devices.
  • Page 28 Turn the ignition key to the run position. (DO NOT CRANK the engine.) This will power the distributor. Distributor Alignment: There are two LED’s on the distributor circuit board. These will be used to align the distributor, by indicating when the crank and cam sensors are being triggered. The crank and cam LED’s are noted in Figure 1 below. NOTE: All adjustments will be made by rotating the distributor housing only.
  • Page 29 Clockwise Rotor Rotation: (See chart to determine what direction your distributor rotates.) For engines that have the rotor rotating clockwise, turn the Slowly turn the housing clockwise until the Crank LED goes housing until the rotor contact is pointed at the black crank OFF (Figure 3).
  • Page 30 Counter-Clockwise Rotor Rotation: (See chart to determine what direction your distributor rotates.) For engines that have the rotor rotating counter-clockwise, turn Slowly turn the housing counter-clockwise until the Crank LED goes the housing until the rotor is pointed at the black crank position OFF (Figure 6).
  • Page 31 For additional instructions on how to setup a Sniper EFI using a Holley Dual Sync Distributor, please reference this helpful video. https://www.youtube.com/watch?v=O5_089Q39CA...
  • Page 32 Direct-Drive Coil WIRING W/ Holley Dual Sync Distributor Holley Dual Sync Distributor WIRING W/ and CAPACATIVE DISCHARGE BOX (Such as MSD 6AL) HOLLEY DUAL SYNC DISTRIBUTOR PINOUT: If custom wiring the distributor, use the following pinout: Connector Location Channel...

  • Page 33: Sniper Efi Hyperspark Distributor [Timing Control]

    Sniper EFI HyperSpark Distributor [Timing Control] Sniper EFI HyperSpark distributors are designed to work with Sniper EFI systems for timing control. The design of these distributors includes a Hall Effect Sensor for Crank Signal. The precision machined shutter wheel design ensures accurate timing, even at very high engine speeds making them an excellent choice for Sniper installations utilizing timing control.

  • Page 34: Handheld Navigation

    HANDHELD NAVIGATION Possible Screens The 3.5” handheld utilizes a touch screen display. All navigation is done through “touching” an icon or button on the screen. The following is an overview of the different types of adjustment screens that are used in the display, and that may be utilized when tuning or making selections.
  • Page 35 Graph Options: Digitally: Selecting this option enables slider bar adjustment of individual data points on the graph or the entire curve. Graphically: Selecting this option enables single point or whole curve adjustment. A stylus may be used to select and drag data on the graph screen. Entire Curve: Selecting this will ‘lock’...

  • Page 36: Initial Efi Setup

    INITIAL EFI SETUP Calibration Wizards Turn the ignition key to the “run” position. This should apply 12+ volts to the Pink wire in the ECU harness and will power the Sniper EFI Touch Screen LCD. The Home Screen (figure below) should appear. The Home screen contains icons which will navigate to different functional features of the 3.5”...
  • Page 37 Use the Slider Bar to Scroll Down STEP 2 - Press Next - Select the number of cylinders your engine has Note: Quadrajet Sniper EFI only supports 6 & 8 STEP 3 Cylinder Engines - Press Next - Use the slider bar or numerical editor to input the...
  • Page 38  Coil (-) [no timing control]  CD Ignition Box [no timing control] STEP 7  Magnetic Distributor  Holley Dual Sync Distributor  HyperSpark Distributor - Press Next Use the slider bar to set your desired ignition timing at...

  • Page 39: Sensor Verification

    Sensor Verification Before starting the vehicle, verify that all of the sensors are reading properly. To do this, turn the ignition key off, and cycle it back on. You should hear the fuel pump come on and run for 5 seconds. Fuel Prime occurs 2.5 seconds after key-on (which is also the amount of time it takes for the 3.5”...

  • Page 40: Prestart Checklist

    “Syncing”, indicating the ECU is syncing with the RPM signal for an instant, then show an RPM signal. The engine should fire and run and come to an idle. If the engine does not start please use the flow chart at the end of this Manual. If issue still continues then Call Holley Tech service for advice.

  • Page 41: Ignition Timing Check (Without Timing Control)

    AIR/FUEL RATIO Multi-Gauge AIR/FUEL RATIO Multi-Gauge Engine below 160° F (NoLearn) Engine above 160° F (Learng) Ignition Timing Check (without Timing Control) Verify with a timing light that the timing is set to an appropriate value for particular engine combination. Adjust as necessary.

  • Page 42: Throttle Blade Adjustment

    THROTTLE BLADE ADJUSTMENT Once engine has warmed up above 160 degrees the throttle blade angle can be set. It is critical for the engine to be above 160 degrees F before setting the throttle blade angle. From the Home screen, Select the Tuning Icon. Then Select Basic and then the Basic Idle Icons. This will allow you to set your basic Engine Idle Speed when engine is up to temperature.

  • Page 43: System Setup

    From the Home Screen, Select the Tuning Icon. Then Select the System Icon. Next Select the Ignition Setup Icon. Here is where you can change you Ignition settings. Following are examples of what the specific default ignition configurations look like in the handheld. Coil - Magnetic CD Box Holley Dual...

  • Page 44: Basic Tuning

    The Basic Tuning allows changes to the Air/Fuel Ratio’s, changes to Ignition Timing if the Sniper is configured to as a Magnetic distributor or a Holley Dual Sync ignition setup , Closed Loop and Learning, and basic idle speed. The Advanced Tuning is typically not needed.

  • Page 45: Target Afr

    Target AFR Allows changes to the Target Air/Fuel ratio at idle, cruise, and wide open throttle (Figure 23). The following are typical values and some tuning notes. Idle Air/Fuel Ratio – Typically between 13.5 and 15.0. Engines with larger cams may need a richer setting for smoothest idle.

  • Page 46: Fuel Prime

    Fuel Prime Fuel prime is an option that is enabled by default in all of the base calibrations. The fuel prime function injects a small shot of fuel into the intake manifold when the ignition is turned on, wetting the intake and allowing the engine to start much quicker.

  • Page 47: Learn Enable/Disable

    Learn Enable/Disable The LEARN Enable / Disable menu turns the Self Tuning “On” and “Off”. If enabled, self-tuning is performed. Learning should be enabled when an engine is first run with the Sniper EFI and the tuning process is occurring. After the vehicle is driven under various operating conditions, and is running well, it is advised to limit the amount of learning that can occur in the Advanced Learn menu.

  • Page 48: Spark

    Spark All Holley base tunes contain timing curves that will allow the engine to run, however the ignition timing at idle, cruise, and wide open throttle can be adjusted independently from each other to compensate for different engine combinations, elevation and climate extremes.

  • Page 50: Engine Setup

    Engine Setup These parameters should be all properly pre- set when you went through the Wizard Process. They can be modified here, and if the Key Icon is next to the Parameter, the change will not take place until the ignition is cycled. KPA to Engine Vacuum at Sea Level Manifold Vacuum (inHg) Number of Cylinders: Adjust the number of cylinders of the engine...

  • Page 51: Ignition Setup

    Ignition Setup These parameters should be all properly pre- set when you went through the Wizard Process. They can be modified here. Note: If the Key Icon is next to the Parameter, the change will not take place until the ignition is cycled. Ignition Type: Change the calibration for different ignition setups Reference Angle (Timing Control Configurations Only): This is the value in crank degrees of the distributor's crank pulse.

  • Page 52: Advanced Tuning

    ADVANCED TUNING From the HOME MENU, select TUNING, and ADVANCED. There are five areas you can modify; ADV FUEL, CLOSED LOOP, ADV. LEARN, ADV. IDLE and LAUNCH. These are reviewed below. The Advanced Tuning areas typically won’t ever be needed to be changed. However, after getting used to the Sniper EFI system, there may be some fine tuning of various parameters that you’d like to perform.
  • Page 53 Closed Loop CLOSED LOOP OPERATION relies on WBO2 sensor readings. The Sniper EFI system uses these readings to analyze ‘real time’ running conditions. The data obtained by the ECU is then used trim fuel flow to achieve the targeted air fuel ratio (AFR). Choosing CLOSED LOOP from the ADVANCED TUNING menu will allow you to modify 3 areas of the CLOSED LOOP operation.

  • Page 54: Iac Rampdown

    100% (fully open, maximum air flow). NOTE: Contact Holley Tech Support if you have any questions regarding IAC settings. Selecting IAC RAMPDOWN brings up the following menu with four choices, IAC HOLD POSITION, IAC RAMP DECAY, IAC RAMP START, and IAC KICK. These are reviewed below: ...

  • Page 55: Idle Spark

    IAC Speed This menu is used to select the type of IAC motor application that is being used. This selection drives the background parameters that control the IAC motor. These parameters have been fine tuned for each of these applications, eliminating the need for the user to perform further modifications IAC Startup These parameters control the position of the IAC when the engine is cranking and immediately after it starts.

  • Page 56: Idle Speed

    NOTE: This feature should be disabled when checking base timing with a timing light and not using the Static Timing option. If not disabled rev the engine to approximately 2000 RPM when syncing timing. Idle Speed Idle speed will allow you to change the target idle speed for different coolant temperatures. Launch Sniper EFI has a secondary rev limiter and the ability to retard the ignition timing after a trigger point.

  • Page 57: Sniper Efi Monitor

    Type: The launch retard can be configured as RPM or TIME based Launch Retard Activation: The launch retard will be active when the specified input see signal, or when the specified input loses signal Launch Retard Input: Choose which input will be used to activate the Launch Retard SNIPER EFI MONITOR Sniper EFI allows the user to monitor different channels using the 3.5”...

  • Page 58: Changing Monitor Channel Scaling

    Below are an example of the Sensors Multi-Gauge and the Air/Fuel Ratio Multi-Gauge Changing Monitor Channel Scaling You can change the scale and background warning iii. Caution Min: Where Gauge Warning will activation thresholds on the data monitor channels become Red on Low Side Press the “Monitor”...

  • Page 59: Custom Configuring Dash 1 Dash 2 Or Dash 3

    i. Display Min: 8.0 A/F ii. Display Max: 18.5 A/F iii. Caution Min: 10.5 A/F iv. Caution Max: 16.0 A/F v. Normal Min: 11.5 A/F vi. Normal Max: 15.0 A/F Example: Air/Fuel Ratio: Large Round Sweep from 8.0-18.5AFR Red Background when Leaner than 16.0 and Richer than 10.5 Yellow Background when between 15.0-16.0 AFR and 10.5-11.5 AFR...

  • Page 60: Nitrous Tuning On Handheld

    NITROUS TUNING ON HANDHELD This is not supported with Quadrajet Sniper EFI. Nitrous Control is supported but must be configured using the Sniper EFI Software. Please read the Sniper EFI software instructions to properly setup the Boost Controller in the software and determine what certain parameters do.
  • Page 61 Typically between 12.0 and 12.8. Running richer may reduce Target air fuel ratio power. Running leaner may reduce power or cause potential at WOT engine damage Note: The Target Air/Fuel setting between IDLE, CRUISE, and WOT is blended together automatically. Consequently, the air/fuel you see on the MONITOR screen, may not be exactly what you set for the settings.
  • Page 62 Basic : Closed Loop / Learn This menu enables or disables closed loop operation. There is typically no reason to turn off closed loop operation unless you Closed loop suspect an oxygen sensor problem and want to disable the enable/disable sensor.
  • Page 63 Tuning : System The OUTPUT screen allows for the Fan #1 and Fan #2 ON and OFF temperatures to be adjusted. The ON temp needs to always be a higher value than the OFF temp. Use a difference of at Fan #1 On least 5 degrees so they aren’t cycling excessively.
  • Page 64 Note: Values above 2.5 can lead to premature coil driver failure. This gets the commanded static timing value that has been set previously, if user navigated away from static timing check screen and the ignition has not been cycled. Static Timing This sets the commanded timing to the chosen value This clears the static timing value Clear...
  • Page 65 Advanced : Closed Loop This menu enables or disables closed loop operation. There is typically no reason to turn off closed loop operation unless you suspect an oxygen sensor problem and want to disable the Closed loop enable sensor. Note: Self-Tuning requires closed loop operation to / disable function...
  • Page 66 Advanced : Adv Idle This is the position the IAC motor will “hold” or “freeze” at when the TPS moves above idle (when TPS becomes greater than IAC hold position 0%). If it is too high, the engine RPM will “hang” and not return to idle.
  • Page 67 Advanced : Launch Rev Limiter #1 Enable or Disable Rev Limiter #1 Enable Rev Limiter #1 RPM set point for Rev Limiter #1 2-Step Rev Limiter #1 Choose the input wire used on the 10-pin harness Input Launch Retard Enable or Disable the programmable launch retard Enable Launch Retard Use this to edit the launch retard curve...
  • Page 68 Super Sniper : Nitrous If using Sniper for Nitrous Control, this will Enable or Disable the Disable Stage Minimum RPM required for NOS activation Min RPM Maximum RPM allowed for NOS activation. Any RPM above this Max RPM will turn off the stage. Activation This will delay the activation by the amount selected.
  • Page 69 Super Sniper : Advanced These tables require software for initial configuration and are Enable/Disable intended for advanced EFI users. Table Name These tables require software for initial configuration and are (display only) intended for advanced EFI users. Table Type (display These tables require software for initial configuration and are only) intended for advanced EFI users.

  • Page 70: Datalogging & File Transfers

    DATALOGGING & FILE TRANSFERS For video instructions on how to take a data log and view the datalog with the Sniper EFI system reference this helpful video: https://www.youtube.com/watch?v=rHjLwJQ45Kw&list=PLNMSNx7tRu2sxs6NmwrT3Gi-oO2x0ea 3. To turn off Data Logging press “Stop Log” from the Logging Menu. Taking a Datalog with the 3.5”...

  • Page 72: Downloading Global Configuration From Sniper Efi Throttle Body To Sd Card

    Loading Calibration into Sniper EFI ECU Press “File” icon from the Main Menu Downloading Global Configuration from Sniper EFI Throttle Body to SD card: 1. Press “File” icon from the Main Menu Press the “Global Configs” Icon 2. Press the “Global Configs” Icon Highlight the Configuration you would like to load into the Sniper EFI (making it highlight in Blue).

  • Page 73: Laptop Support

    Put the saved Configuration from SD card (in Saved GCF folder) in the Sniper EFI Config File Folder, this is in your Documents folder if the Sniper Software was installed in the default location This PC > Documents > Holley > Sniper > Config Files Open Sniper EFI Software, and click “Open Config File” icon...

  • Page 74: Viewing Datalog With Sniper Efi Software

    Choose the saved Configuration you are wanting to open Calibration can be viewed and Modified using the Sniper Software. It can be saved directly to the SD card or to the Config Files folder. If saving to the Config Files Folder a copy of the tune will also need to be placed on the SD Card to Transfer it to the Sniper EFI via the Handheld.

  • Page 75: Troubleshooting

    “Open” Button. The data log will open to be viewed. TROUBLESHOOTING Troubleshooting Guide Holley has created a troubleshooting flow chart to help customers with issues they may be having. This can be found on www.holley.com. Here is a direct link to the Troubleshooting Guide. http://documents.holley.com/199r11369.pdf Sensor Verification Verify all sensors are reading properly on the handheld.
  • Page 76 System is in closed loop operation. Learn Status – Shows status of learn mode. Text Description NoLearn Learning is not active. Learng Learn is in an active state. © 2018 Holley Performance Products, Inc. All Rights Reserved. Tous Droits Réservés. 199R11324 Revision Date: 11-2-20...

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