1997 Saab 9000 CS, StandardFACTORY OEM SERVICE PROCEDURE

Fuel Pump Delivery Pressure

  1. Turn ignition off. Disconnect banjo coupling at inlet to fuel injection manifold. Connect fuel pressure gauge, using existing seals. Hang pressure gauge vertically. Turn ignition on. Pinch off fuel return line. Measure fuel pressure. When line is plugged, fuel pressure should increase immediately.
    CAUTION: DO NOT  allow pressure to exceed 82 psi (5.8 kg/cm2 ).
  2. If fuel pressure does not increase, inspect for following faults:
    • Less than 11.5 volts across fuel pump terminals.
    • Obstructed fuel lines.
    • Clogged fuel filter.
    • Fuel filter installed backward.
    • Defective relief valve in fuel pump.
      NOTE: If fuel filter has been installed backward, it must be replaced.
  3. After measuring fuel pump pressure, turn ignition off. Leave pressure gauge connected. Go to FUEL PUMP FLOW  .
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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