Engine Maintenance and Modification Bradley Artigue 1st Edition Engine Maintenance and Modification Bradley Artigue 1st Edition FIAT 124 Spider Engine Maintenance + Modification Contents 1. Introduction ......................................................................................................................................................5 2. Concepts............................................................................................................................................................6 2.1 The Otto Cycle .............................................................................................................................................6 2.2 Lambda ........................................................................................................................................................6 2.3 Carburetor ....................................................................................................................................................7 2.4 Fuel Injection (FI or EFI) ...............................................................................................................................7 2.5 Compression Ratio (CR)...............................................................................................................................7 2.6 Home Mechanic...........................................................................................................................................8 2.7 Shop Manuals and Guides ...........................................................................................................................8 3. Engine Identification ........................................................................................................................................9 4. Carburetion .....................................................................................................................................................11 4.1 Understanding Carburetors........................................................................................................................11 4.2 Air Bleed Correction...................................................................................................................................12 4.3 Idle Speed Control .....................................................................................................................................13 4.4 Transition....................................................................................................................................................13 4.5 Acceleration Pump.....................................................................................................................................14 4.6 Cold Starting...............................................................................................................................................15 4.7 Multi-Barrel Synchronization ......................................................................................................................16 4.8 Carburetor Identification and Schematics ..................................................................................................18 4.9 Carburetor Tuning ......................................................................................................................................35 4.10 Diagnostics and Troubleshooting.............................................................................................................36 5. Fuel Injection...................................................................................................................................................38 5.1 Fuel injection Basics ..................................................................................................................................39 5.2 The Air Flow Meter and Fuel Pump ...........................................................................................................40 5.3 Cold Starting Components.........................................................................................................................41 5.4 Warm-Up Components ..............................................................................................................................42 5.5 Idle Speed Control Components................................................................................................................42 5.6 Cruising, Accelerating, and Deceleration Modes .......................................................................................43 5.7 The Oxygen Sensor ...................................................................................................................................44 5.8 Other Components ....................................................................................................................................44 5.9 Component Reference...............................................................................................................................45 5.10 Fuel Injection Tuning................................................................................................................................48 5.11 Fuel Injection System Electrical Diagrams...............................................................................................50 5.12 Fuel Injection System Part Numbers .......................................................................................................53 5.13 Diagnostics and Troubleshooting.............................................................................................................54 6. The Cylinder Head ..........................................................................................................................................59 6.1 Cylinder Head Identification .......................................................................................................................61 7. Intake Manifolds .............................................................................................................................................63 8. Exhaust System..............................................................................................................................................64 8.1 Exhaust System Identification ...................................................................................................................64 9. Ignition ............................................................................................................................................................66 9.1 Ignition Components..................................................................................................................................66 9.2 Ignition System Identification ....................................................................................................................67 9.3 Ignition Advance ........................................................................................................................................68 9.4 Firing Order and Initial Timing ....................................................................................................................69 9.5 Ignition Electrical Diagrams........................................................................................................................72 3 FIAT 124 Spider Engine Maintenance + Modification 9.6 Diagnostics and Troubleshooting...............................................................................................................74 10. The Major Tune Up.......................................................................................................................................76 10.1 Preparation...............................................................................................................................................76 10.2 Tuning Procedure.....................................................................................................................................79 11. Improvements*.............................................................................................................................................80 11.1 Cylinder Head Improvements ..................................................................................................................81 11.2 Intake Manifolds ......................................................................................................................................84 11.3 Ignition .....................................................................................................................................................84 11.4 Exhaust and Emissions Control ...............................................................................................................86 11.5 Carburetors ..............................................................................................................................................87 Figures .................................................................................................................................................................89 Tables ..................................................................................................................................................................90 Copyright © 2007 Bradley James Artigue. All Rights Reserved. This guide and others in this series are for educational purposes. All are freely distributable in their original, unedited, and complete form. The online home of this