FIAT 124 Spider
Engine Maintenance + Modification
47
Component Description
Connector
Fuel Line
Tip
Body
Fuel Injector & Seals
P/N 0 280 150 127 (DS0 Spiders) or 0 280 150 121 (CS0 Spiders)
Seals P/N 1 280 206 702 and 703
A fuel injector is an extremely simple electrical device. The ECU will send a
small current to the injector (via the connector), opening the injector and
allowing fuel from the fuel rail to spray through the tip and into the engine. The
tip of the injector is an insulator; the injector itself is a small opening in the
center of the tip. Injectors are seated in the manifold with large rubber isolators
around the tip and the injector body, insulating the injector from vibration.
Cold Start Injector
P/N 0 280 170 041
Upon receiving the "on" signal from the ECU, the cold start injector sprays fuel
into the intake plenum, creating the rich fuel mixture required during cold starts.
The duration of time in which the injector operates is determined by the thermo-
time switch.
Double Relay
P/N 0 332 514 127
The double relay consists of two relays molded into a single container. It is
located near the ECU. Signals from the ECU enter the relay and trigger higher
voltage components.
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