Cadillac engine knowledge
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| − | 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 is a throttle body centered on an intake manifold with separate fuel injectors, and resembles the | + | 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 is a throttle body centered on an intake manifold with separate fuel injectors, and resembles the EFI set-up used on NASCAR Sprint Cup cars ca. 2012. 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. | 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. | ||
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