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Fuel System Pressure Release

NOTE: For CNG and bi-fuel vehicles, see FUEL SYSTEM VENTING in appropriate REMOVAL, OVERHAUL & INSTALLATION article.
WARNING: Always relieve fuel pressure before disconnecting any component under fuel pressure. DO NOT allow fuel to contact engine or electrical components.
  1. 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. Place fuel pressure gauge in a suitable container. Using gauge, release pressure from system.
  2. If fuel pressure gauge is not available, disconnect Inertia Fuel Shutoff (IFS) switch. See INERTIA FUEL SHUTOFF SWITCH LOCATION  table under INERTIA FUEL SHUTOFF SWITCH. Remove fuel cap to release fuel tank pressure. Crank engine for 15 seconds to release system pressure.
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