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Home >> Mercury >> 1991 >> Grand Marquis LS >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System Pressure Release >> Notes
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Fuel System Pressure Release: Notes

Remove fuel tank cap. Using Fuel Pressure Gauge (T80L-9974-B), release pressure from system at pressure relief valve (Schrader valve), located on fuel injection manifold rail.

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