Engine Maintenance and Modification Bradley Artigue
FIAT 124 Spider Engine Maintenance + Modification - Artigue.com
FIAT 124 Spider Engine Maintenance + Modification - Artigue.com
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FIAT 124 Spider<br />
<strong>Engine</strong> <strong>Maintenance</strong> + <strong>Modification</strong><br />
Contents<br />
1. Introduction ......................................................................................................................................................5<br />
2. Concepts............................................................................................................................................................6<br />
2.1 The Otto Cycle .............................................................................................................................................6<br />
2.2 Lambda ........................................................................................................................................................6<br />
2.3 Carburetor ....................................................................................................................................................7<br />
2.4 Fuel Injection (FI or EFI) ...............................................................................................................................7<br />
2.5 Compression Ratio (CR)...............................................................................................................................7<br />
2.6 Home Mechanic...........................................................................................................................................8<br />
2.7 Shop Manuals <strong>and</strong> Guides ...........................................................................................................................8<br />
3. <strong>Engine</strong> Identification ........................................................................................................................................9<br />
4. Carburetion .....................................................................................................................................................11<br />
4.1 Underst<strong>and</strong>ing Carburetors........................................................................................................................11<br />
4.2 Air Bleed Correction...................................................................................................................................12<br />
4.3 Idle Speed Control .....................................................................................................................................13<br />
4.4 Transition....................................................................................................................................................13<br />
4.5 Acceleration Pump.....................................................................................................................................14<br />
4.6 Cold Starting...............................................................................................................................................15<br />
4.7 Multi-Barrel Synchronization ......................................................................................................................16<br />
4.8 Carburetor Identification <strong>and</strong> Schematics ..................................................................................................18<br />
4.9 Carburetor Tuning ......................................................................................................................................35<br />
4.10 Diagnostics <strong>and</strong> Troubleshooting.............................................................................................................36<br />
5. Fuel Injection...................................................................................................................................................38<br />
5.1 Fuel injection Basics ..................................................................................................................................39<br />
5.2 The Air Flow Meter <strong>and</strong> Fuel Pump ...........................................................................................................40<br />
5.3 Cold Starting Components.........................................................................................................................41<br />
5.4 Warm-Up Components ..............................................................................................................................42<br />
5.5 Idle Speed Control Components................................................................................................................42<br />
5.6 Cruising, Accelerating, <strong>and</strong> Deceleration Modes .......................................................................................43<br />
5.7 The Oxygen Sensor ...................................................................................................................................44<br />
5.8 Other Components ....................................................................................................................................44<br />
5.9 Component Reference...............................................................................................................................45<br />
5.10 Fuel Injection Tuning................................................................................................................................48<br />
5.11 Fuel Injection System Electrical Diagrams...............................................................................................50<br />
5.12 Fuel Injection System Part Numbers .......................................................................................................53<br />
5.13 Diagnostics <strong>and</strong> Troubleshooting.............................................................................................................54<br />
6. The Cylinder Head ..........................................................................................................................................59<br />
6.1 Cylinder Head Identification .......................................................................................................................61<br />
7. Intake Manifolds .............................................................................................................................................63<br />
8. Exhaust System..............................................................................................................................................64<br />
8.1 Exhaust System Identification ...................................................................................................................64<br />
9. Ignition ............................................................................................................................................................66<br />
9.1 Ignition Components..................................................................................................................................66<br />
9.2 Ignition System Identification ....................................................................................................................67<br />
9.3 Ignition Advance ........................................................................................................................................68<br />
9.4 Firing Order <strong>and</strong> Initial Timing ....................................................................................................................69<br />
9.5 Ignition Electrical Diagrams........................................................................................................................72<br />
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