Cadillac engine knowledge

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-The factory EFI system used from 1975-'76 on 500 cubic inch engines is a ported injection system which operates similar to the familiar Chevy TPI. It looks like a large throttle body on an intake with separate fuel injectors. Each cylinder has its own injector mounted in the intake runner near the intake gasket area with a common fuel rail feeding all eight injectors. This system was also used through 1979 on the Seville as standard equipment and as an option on full size cars.
+The factory EFI system used from 1975-'76 on 500 cubic inch engines is a port injection system which operates similar to the familiar Chevy TPI. It looks like a large throttle body on an intake with separate fuel injectors. Each cylinder has its own injector mounted in the intake runner near the intake gasket area with a common fuel rail feeding all eight injectors. This system was also used through 1979 on the Seville as standard equipment and as an option on full size cars.
 It consists of four main systems; the ECU, the fuel delivery system, the air distribution system, and the sensors which supply information to the ECU. The ECU is a pre-programmed computer that analyzes the sensor information and computes the exact fuel requirements based on that information. It supplies the proper amount of fuel by opening the injectors for a specific amount of time, which varies as the engine operating conditions change.

Revision as of 15:09, 30 March 2012