Intro to Fiat Fuel Injection Systems
Fiat used the Bosch L-Jetronic system on its cars in the early 80's. Spider 2000, Brava, Strada, Yugo, Beta/ Zagato, and X 1/9 all used this same system. Locations of some parts differ on different models. Graphics here relate more closely to the Spider.
The system is of the timed port-injection type, with injection solenoids delivering the fuel on demand, the length of time the solenoid is open determining the amount of fuel being delivered to the engine.
The time the injector is held open, and therefore the amount of fuel that is delivered into the engine, is determined by the Electronic Control Unit (ECU), which receives signals from a variety of sensors, the key of which is the air flow meter, which measures the amount of air entering the intake system.
1. air flow meter
2. crankcase breather hose
3. dist. vacuum
4. intake manifold
5. accelerator cable
6. vac. hose to auto. trans.
7. hose to carbon trap
8. hose to AC electrovalve
9. hose to brake booster
10. fuel pressure regulator
11. hose to AC system
12. fuel manifold
13. cold start valve
14. aux air valve
15. AC electrovalve
16. air filter