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Perfect Power XMS4A - User Manual

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XMS4A
LetRipp II
Engine Management System
DIY MANUAL
Version 2.1

Table of Contents

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Summary

TECHNICAL DETAILS

FUEL INJECTION SPECIFICATIONS

Details on fuel injection capabilities, mapping, and calculation.

FEATURE EXPLANATION

LAUNCH CONTROL SYSTEM

System for turbo lag elimination and RPM control.

IGNITION MAP FUNCTION

Map controlling ignition timing based on engine parameters.

COMMUNICATION CONNECTION SETUP

USB DRIVERS INSTALLATION

XMS4 A UNIT PIN OUTS

MAIN CONNECTOR PINOUT (22-PIN)

CAR FUEL SYSTEM ASSESSMENT

ENGINE ASSESSMENT

WHEEL AND SENSOR INSTALLATION

XMS4 A MOUNTING LOCATION

UNSUITABLE MOUNTING PLACES

IGNITION AMPLIFIER MOUNTING

UNSUITABLE AMPLIFIER PLACES

SENSOR WIRING GUIDE

AMP (MAP) SENSOR WIRING

ENGINE TEMP SENSOR WIRING

AIR TEMP SENSOR WIRING

THROTTLE POSITION SENSOR WIRING

CRANK ANGLE SENSOR WIRING

CAMSHAFT SENSOR WIRING

INJECTOR WIRING

IGNITION AMPLIFIER WIRING

DETAILED IDLE CONTROL

IDLE CONTROL SETUP PROCEDURE

DWELL TIME MANAGEMENT

DWELL SETUP VIA SOFTWARE

PARAMETER SETUP

SYSTEM DEFINITION OPTIONS

SENSOR CALIBRATION

AMP (MAP) SENSOR CALIBRATION

Calibration steps for the AMP (MAP) sensor.

ENGINE TEMP SENSOR CALIBRATION

Calibration steps for the Engine Temperature sensor.

AIR TEMP SENSOR CALIBRATION

THROTTLE POSITION CALIBRATION

RPM SETUP AND LIMITS

RPM SETUP & CALIBRATION

Software setup and calibration for RPM readings.

PRE-START ENGINE CHECKS

IGNITION TIMING MARK SETUP

Checking and adjusting ignition timing.

IGNITION TIMING ADJUSTMENT

ENGINE STARTUP PROCEDURES

CRANKING ENGINE CHECKS

Checks for RPM, AMP, and injector timing during cranking.

IDLE SETUP FOR ENGINE TEMP

FUEL SETUP WITH AMP MULTIPLIER

TROUBLESHOOTING: ENGINE WONT START

BASIC STARTING CHECKS

Covers fuel, battery, and XMS4A power checks.

SPARK TESTING PROCEDURES

Detailed checks for single coil and coil pack spark.

INJECTOR OPERATION TESTS

FIRST-TIME XMS4 A TUNING

IGNITION TUNING GUIDELINES

ACCELERATION ENRICHMENT SETUP

BOOST CONTROL SETUP

CLOSED LOOP BOOST CONTROL

Setup for closed-loop boost control.

BOOST CONTROL VIA PWM

LAUNCH CONTROL FUNCTION

LAUNCH CONTROL SOFTWARE SETUP

TROUBLESHOOTING GUIDE

FUELING PROBLEMS

Common fueling problems affecting performance.

FUEL PRESSURE ISSUES

IGNITION TIMING ISSUES

SPARK PLUG CHECKS

COIL INSPECTION

TWO WIRE COIL TESTING

THREE WIRE COIL TESTING

FOUR WIRE COIL TESTING

TRIGGER WHEEL PROBLEMS

TRIGGER SENSOR PROBLEMS

ENGINE MECHANICAL FAILURE

BASIC XMS4 A-2 A WIRING DIAGRAM

BASIC XMS4 A-4 A WIRING DIAGRAM

Perfect Power XMS4A Specifications

General IconGeneral
CategoryEngine
Displacement4.0L
Cylinders6
Fuel TypeGasoline
AspirationNaturally Aspirated
Valve ConfigurationDOHC