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Home >> GMC >> 1994 >> Forward Control 7.4 N >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - Gasoline >> A-7, Basic Fuel System Checks >> Fuel System Pressure Relief >> Model 220 TBI Unit
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Model 220 TBI Unit

Fuel pressure is relieved and drops to zero when ignition is turned off. To minimize risk of fire and personal injury, cover area to be disconnected with a shop rag.