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Fuel System Pressure Release: B4000
- Disconnect negative battery cable. If necessary, remove snow/ice shield. Remove air intake tube between air cleaner and throttle body. On all models, remove fuel filler cap to release fuel tank pressure. Connect Fuel Pressure Gauge (49-UN01-010) to fuel pressure relief valve (Schrader valve) on fuel supply manifold, near fuel pressure regulator. See Figure
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- As an alternate method, disconnect inertia switch connector behind right side of instrument panel, under radio. Start engine and operate until it stalls.