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B2500, B3000 & B4000

  1. Install Fuel Pressure Gauge (49 UN01 010) to fuel pressure relief valve (Schrader valve) located on fuel rail. Place fuel pressure gauge drain hose in suitable container and press pressure relief button until fuel pressure is released.
  2. If fuel pressure gauge is not available, disconnect inertia fuel shutoff switch connector. Switch is located under instrument panel, right of transmission hump. Crank engine 15-20 seconds to relieve pressure. Reconnect inertia fuel shutoff switch.
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