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Home >> Chevrolet >> 1988 >> Sprint Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> EFI Turbo >> Operation >> ECM Controlled Devices >> Fuel Pump Control
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Fuel Pump Control

When ignition is turned on, the ECM energizes the fuel pump relay. The relay will operate the fuel pump for 4 seconds to pressurize fuel system. After engine start, the relay contacts are held closed by ECM. If engine-running signals to ECM are interrupted, ECM will de-energize relay.

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