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 />
Component<br />
Description<br />
Auxiliary Air Regulator<br />
P/N 0 280 140 120 or 0 280 141 013 (Spider with A/C)<br />
This device allows air to be drawn directly into the plenum, bypassing the<br />
throttle plate. The effect is an increase in idle speed – the computer will give<br />
the engine more fuel to create an appropriate ratio to the inbound air. Once<br />
engine temperatures reach the normal operating range the auxiliary air valve<br />
closes.<br />
Fuel Pressure Regulator<br />
P/N 0 280 160 214<br />
The fuel pressure regulator receives fuel from the fuel pump <strong>and</strong> keeps the fuel<br />
pressure into the injectors constant. It is located on the fuel rail <strong>and</strong> connects<br />
(via the rail) to the injectors <strong>and</strong> fuel pump. A smaller vacuum hose connects<br />
this regulator to the intake manifold. It maintains a constant flow rate at the<br />
injector tip as manifold pressure varies; increasing fuel pressure when manifold<br />
is near ambient <strong>and</strong> dropping it as the manifold vacuum increases.<br />
Failure of this device can cause fuel starvation or too much fuel in the system,<br />
affecting performance.<br />
Fuel Pump<br />
P/N 0 580 464 019<br />
Located under the car <strong>and</strong> near the fuel tank, the fuel pump delivers fuel through<br />
the fuel filter <strong>and</strong> the fuel rail <strong>and</strong> into the injectors.<br />
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