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Home >> BMW >> 1993 >> 850Ci Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics >> Self-Diagnostic System >> Self-Diagnostics Feature >> EKP-Relay
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Self-Diagnostics Feature: EKP-Relay

The relays of the electric fuel pumps (EKP) are operated by DME main relay. At ignition ON, power is briefly applied to EKP relays for approximately 0.5 seconds in order to build up fuel pressure. Fuel pumps run constantly after engine start.

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