LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saab >> 1993 >> 9000 CS, 2.3 M, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pressure >> Fuel Pressure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Pressure

  1. Turn ignition off. Disconnect banjo coupling at inlet to fuel injection manifold. Connect a fuel pressure gauge using existing seals. Hang pressure gauge vertically.
  2. Remove fuse No. 30 on 900 Series or fuse No. 14 on 9000 Series. Connect a jumper lead between fuse No. 27, 28 or 29 and slot of fuse No. 30 on 900 Series, or between fuse No. 22 and slot of fuse No. 14 on 9000 Series. This will provide current to fuel pump. Turn ignition on.
  3. Fuel pressure should increase to about 36-43 psi (2.5-3.0 kg/cm2 ). If fuel pressure is too high, go to next step. If fuel pressure is too low, go to step 5).
  4. Turn ignition off. Disconnect fuel return line from pressure regulator. Blow through line. If line is open, pressure regulator is defective and should be replaced. If line is blocked, remove blockage or replace with a new return line. Check one-way valve at tank, and retest system.
  5. Check fuel level; DO NOT  rely on fuel gauge. Check for fuel system leaks. Test fuel pressure regulator. See FUEL PRESSURE REGULATOR  .
scientia non olet · About LEMON Manuals