
Tec3r Manual Version 1.11 - Page 3 - ©2017 Electromotive, Inc.
B.8.e. RPM Rate-of-Change Sensitivity................................................................................ 32
B.8.f. Wiring a 2-wire IAC:................................................................................................... 33
B.8.g. Wiring a 3-wire IAC: .................................................................................................. 34
B.9. Tuning the Knock Control......................................................................34
B.10. Using the Injector Trims.......................................................................34
B.11. Using the Ignition Advance Trims.......................................................35
B.12. Tuning the EGO Sensor........................................................................35
C. Direct Fire Units (DFU’s) .............................................................36
Introduction ......................................................................................................36
C.1. Wiring the DFU’s ....................................................................................36
C.2. DFU to Spark Plugs.................................................................................37
C.3. Spark Plug Wire Routing .......................................................................40
C.3.a. Common Engine Setups .............................................................................................. 40
C.3.b. Special Note for Coil-Per-Plug Applications.............................................................. 41
C.4. Coil and Injector Firing Schemes ..........................................................43
C.4.a. Injector and Coil Firing Patterns for EVEN-FIRE Engines ........................................ 43
C.4.a. Injector and Coil Firing Patterns for EVEN-FIRE Engines (continued)..................... 44
C.4.b. Injector and Coil Firing Patterns for ROTARY Engines ............................................ 45
C.4.c. Injector and Coil Firing Patterns for 2-CYCLE Engines ............................................ 45
C.4.c. Injector and Coil Firing Patterns for 2-CYCLE Engine (continued)........................... 46
C.4.d. Injector and Coil Firing Patterns for ODD-FIRE Engines.......................................... 46
C.4.d. Injector and Coil Firing Patterns for ODD-FIRE Engines (continued)....................... 47
C.4.e. Examples of Typical Engine Setups :......................................................................... 47
C.5. Common Firing Orders ..........................................................................49
C.6. Odd-Fire Engines.....................................................................................49
C.6.a. To find the TDC Event Order:..................................................................................... 50
C.6.b. TDC Tooth for DFU “2” needed for an Odd-Fire Engine: ......................................... 50
C.6.c. Harley-Davidson Applications .................................................................................... 50
C.7. Rotary Engines.........................................................................................51
C.8. Dual Plug Engines....................................................................................51
C.9. Spark Plug Wire Selection......................................................................52
C.10. Spark Plug Selection..............................................................................52
D. Fuel Injector Configurations........................................................53
D.1. High vs. Low Impedance Injectors........................................................53
D.2. Injector Firing Schemes..........................................................................55
D.2.a. Staged Injection........................................................................................................... 56
D.2.b. Throttle Body Injection (TBI)..................................................................................... 56
D.2.c. Phase-Sequential Injection .......................................................................................... 57
D.2.d. Full Sequential Injection ............................................................................................. 58
D.2.e. Rotary Engine Injection............................................................................................... 59
D.3. Injector Wiring........................................................................................60
D.4. Fuel Injector Pulse Width Derivation ...................................................61
D.4.a. Introduction ................................................................................................................. 61
D.4.b. User Adjustable Pulse Width (UAP)........................................................................... 63
D.4.c. Pulse Width Offset Time (POT).................................................................................. 65
D.4.d. Volumetric Efficiency Table Corrections................................................................... 66