Perfect Power XMS4A - Page 3

LETRIPP II XMS4A DIY MANUAL V2.1 www.perfectpower.com ii
PERFECT POWER XMS4A – Engine Management System DIY MANUAL V2.1
13.2 WHY SHOULD I USE A SCREENED CABLE?........................................................17
13.3 WHAT SHOULD YOU USE A SCREENED CABLE ON?............................................17
14. CRANK SIGNALS - WHAT DO THEY LOOK LIKE?....................................................17
14.1 POSITIVE EDGE............................................................................................17
14.2 NEGATIVE EDGE...........................................................................................18
14.3 MAGNETIC...................................................................................................18
14.4 DIGITAL/HALL EFFECT...................................................................................18
15. TYPICAL SENSORS USED AND HOW TO WIRE THEM..............................................18
15.1 AMP............................................................................................................19
15.2 ENGINE TEMP...............................................................................................19
15.3 AIR TEMP ....................................................................................................20
15.4 THROTTLE POSITION ....................................................................................21
15.5 CRANK ANGLE SENSOR .................................................................................21
15.6 CAMSHAFT SENSOR......................................................................................22
15.7 CONCLUSION...............................................................................................22
16. TYPICAL DEVICES DRIVEN BY THE XMS4A...........................................................23
16.1 BOOST SOLENOID ........................................................................................23
16.2 FUEL PUMP RELAY.........................................................................................23
16.3 FAN RELAY...................................................................................................24
16.4 2 WIRE IDLE CONTROL MOTOR.......................................................................24
16.5 SHIFT LIGHTS..............................................................................................25
16.6 REV COUNTER..............................................................................................25
16.7 INJECTORS..................................................................................................25
16.8 IGNITION AMPLIFIERS...................................................................................26
17. IDLE CONTROL – IN MORE DETAIL .....................................................................27
17.1 TWO WIRE IDLE – SOFTWARE SETUP ..............................................................27
17.1.1 F3 – TWO WIRE IDLE FOR XMS4A.............................................................28
17.1.2 SHIFT F2 – SYSTEM DEF .........................................................................28
17.1.3 IDLE RPM TARGET..................................................................................29
17.1.4 SHIFT/F11 – 2WIRE IDLE ........................................................................29
17.1.5 SETTING UP THE IDLE ............................................................................30
18. DWELL TIME....................................................................................................30
18.1 WHAT IS DWELL? .........................................................................................30
18.2 CAN IT DAMAGE YOUR COIL? .........................................................................30
18.3 DWELL SETUP VIA SOFTWARE........................................................................31
19. SETTING UP PARAMETERS.................................................................................32
20. SYSTEM DEFINITION........................................................................................33
21. SET POINTS ....................................................................................................34
21.1 USES ..........................................................................................................34
21.2 WIRING.......................................................................................................34
21.3 SETUP VIA SOFTWARE ..................................................................................35
22. CALIBRATION OF SENSORS...............................................................................35
22.1 AMP............................................................................................................36
22.2 ENGINE TEMP...............................................................................................36
22.3 AIR TEMP ....................................................................................................37
22.4 THROTTLE POSITION ....................................................................................37
22.5 CONCLUSION...............................................................................................37
23. RPM...............................................................................................................38
23.1 SETUP AND CALIBRATION VIA SOFTWARE .......................................................38
23.2 LIMIT..........................................................................................................38
23.3 CONCLUSION...............................................................................................39
24. WHAT TO DO BEFORE TRYING TO START THE ENGINE ..........................................39
24.1 IGNITION SETUP WITH TIMING MARKS AND TIMING LIGHT................................39
24.2 IGNITION ADJUSTMENT VIA SOFTWARE ..........................................................40
25. TIME TO START THE ENGINE.............................................................................40
25.1 FIRST THINGS TO DO WHEN CRANKING THE ENGINE........................................40
25.2 FIRST THINGS TO DISABLE WHEN THE MOTOR IS RUNNING ..............................40
25.3 IDLE SETUP .................................................................................................41
25.4 FUEL SETUP WITH AMP..................................................................................41