What to do if my Holley Sniper EFI Stealth 4500 Automobile Accessories sensor displaying ‘LOW Err’ or ‘HI Err’?
If a sensor displays ‘LOW Err’ or ‘HI Err’, it might be unplugged, have an open or short circuit, or be damaged. Check the sensor to ensure it is properly connected and not damaged.
What to do if Holley Sniper EFI Stealth 4500 Automobile Accessories CTS reads ‘LOW Err’?
If the CTS reads ‘LOW Err’, the connection to the CTS could be unplugged, have an open or short circuit, or be damaged. Double check the connection to the CTS.
What to do if Holley Sniper EFI Stealth 4500 Automobile Accessories TPS does not read between 85% and 100% at wide open throttle?
If the TPS does not read between 85% and 100% at wide open throttle, verify that your throttle linkage is allowing full travel of the throttle arm, as the throttle linkage may not be allowing full travel of the throttle arm.
Checks for vehicle engine and fuel system compatibility before installation.
Details required fuel pump pressure, flow rate, and line specifications for system operation.
Lists essential tools needed for a successful installation process.
Details each component with quantity, service part number, and important notes for installation.
Covers modifications for supercharged applications and steps before mounting.
Instructions on selecting an optimal exhaust location and correctly mounting the O2 sensor bung.
Guidance on installing the coolant sensor in the correct engine passage and avoiding specific locations.
Illustrates fuel system plumbing and recommends components based on HP rating.
Provides a visual guide to connecting the main components of the Sniper EFI system.
Details the wire functions for each connector on the Sniper EFI harness.
Covers essential "DO'S" and "DON'TS" for safe and effective wiring practices.
Identifies specific connectors on the throttle body and pigtail wire functions.
Explains how to connect the 3.5" Touch Screen LCD to the main harness.
Describes how to properly remove unused wires from connectors using specialized tools.
Details the process of trimming wires and using heat shrink for insulation.
Explains wiring for stock ignition systems and HEI distributors without timing control.
Details connecting to aftermarket CD ignition boxes for tachometer signal.
Covers locking out distributor advance and installing an adjustable rotor for timing control.
Step-by-step guide to locking mechanical advance and removing vacuum advance components.
Installing the adjustable rotor and the distributor assembly into the engine.
Procedures for removing and installing the Holley Dual Sync Distributor.
Aligning the distributor using LED indicators and understanding rotor rotation.
How to wire the Sniper EFI system with the HyperSpark Distributor for timing control.
Overview of touchscreen interaction, including slider bars, lists, and radio buttons.
Explains different graph adjustment modes and live data display capabilities.
Guides through the initial setup wizard for configuring the Sniper EFI system.
Inputting engine details like cylinders, displacement, idle speed, and camshaft type.
Configuring ignition type, power adder type, and timing parameters within the wizard.
Setting target AFR and generating the initial calibration file for the ECU.
Checks if all sensors are reading correctly before starting the engine, ensuring proper function.
Essential checks including wiring, fuel pressure, and overall installation review before engine start.
Guides for initial engine start, observation, and post-start checks.
Verifies ignition timing using a timing light when the ECU is not controlling timing.
Guides on setting the distributor position for ECU-controlled ignition timing.
Adjusting throttle blades to achieve the correct IAC position for desired idle RPM.
Configuring ignition type, reference angle, and rev limiters.
Adjusting basic fuel, learning, idle speed, and spark timing.
Modifying air/fuel ratios and adjusting fuel enrichment and prime settings.
Configuring closed loop, self-learning, and basic idle speed.
Fine-tuning ignition timing for idle, cruise, WOT, and boost conditions.
Setting ON/OFF temperatures for electric fan control outputs.
Configuring engine parameters like cylinders, displacement, and Sniper system type.
Adjusting ignition type, reference angle, inductive delay, and static timing.
Modifying coolant enrichment, acceleration, cranking, and afterstart fuel settings.
Configuring closed loop enable, limit, speed, and coolant temperature settings.
Adjusting idle air control (IAC) parameters like rampdown, speed, and startup.
Customizing idle speed, secondary rev limiters, and launch retard functions.
Overview of accessing live data via Monitors, Multi-Gauge, and Sensors screens.
Modifying gauge display parameters, min/max values, and warning thresholds.
Personalizing display screens (Dash 1, 2, 3) by selecting channels and gauges.
Defining target air/fuel ratios and configuring fuel prime settings.
Explaining closed loop operation, self-learning, and basic idle speed adjustments.
Explaining ignition timing parameters for idle, cruise, WOT, and cranking.
Configuring outputs, engine details, Sniper system, and ignition settings.
Setting and verifying static ignition timing for ECU control.
Fine-tuning fuel delivery and idle air control parameters.
Configuring launch control, rev limiters, and idle speed adjustments.
Setting up launch retard, viewing ECU calibration details, and managing global configurations.
Configuring Nitrous activation, stage duration, and boost control parameters.
Instructions on starting, stopping, and automatically triggering data logs based on sensor inputs.
Downloading configurations to SD card and uploading calibrations to the Sniper EFI ECU.
Using the Sniper EFI software to view and manage configuration files without a USB cable.
Opening and analyzing recorded datalog files using the Sniper EFI software.
Verifying sensor readings and understanding diagnostic indicators for common issues.
Interpreting status messages for wideband O2 sensors and other general sensors.
General| Product Line | Sniper EFI Stealth 4500 |
|---|---|
| Throttle Body Size | 4500 |
| Fuel Delivery | Multi-port |
| Fuel Pressure | 58.5 PSI |
| Self-Tuning | Yes |
| Compatibility | Universal |
| Fuel | Gasoline |
| Throttle Body Material | Aluminum |
| ECU Included | Yes |
| MAP Sensor Included | Yes |
| MAP Sensor Location | Internal |
| Fuel Injectors Included | Yes |
| Fuel Rail Material | Aluminum |
| Installation | Bolt-on |
| Type | Electronic Fuel Injection |
| Included Components | ECU, wiring harness, sensors |
| ECU Location | Integrated into throttle body |
| Injector Size | 100 lb/hr |
| Power Output | Up to 650 Horsepower |
| Control System | Self-Tuning ECU |
| Maximum Horsepower Rating | Up to 650 HP (depending on setup) |
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