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Home >> GMC >> 1991 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (TBI) >> Fuel System Pressure Relief >> TBI Unit Model 220
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TBI Unit Model 220

Fuel pressure is relieved and drops to zero when ignitions is turned off.

WARNING: To minimize risk of fire and personal injury, cover area to be disconnected with a shop rag.
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