Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2000 Saab 9-3 Base, 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE
Fuel Pressure Regulator
NOTE:
When testing fuel pressure regulator, fuel pressure should drop or increase in direct proportion to vacuum or pressure applied to fuel pressure regulator diaphragm.
- If fuel pressure gauge is already attached, go to next step. If gauge is not attached, on 9-3, connect gauge to service fitting or on 9-5, disconnect banjo coupling at inlet to fuel injection manifold. Connect fuel pressure gauge at this point, using existing seals. On both models, hang pressure gauge vertically.
- Remove vacuum hose from fuel pressure regulator and connect vacuum/pressure gauge to vacuum port. Connect TECH-2 scan tool to Data Link Connector (DLC). Use scan tool to activate fuel pump.
- Fuel pressure should increase to about 43 psi (3.0 kg/cm2
). Use vacuum pump to reduce system pressures as specified in REGULATED FUEL PRESSURE (VACUUM APPLIED)
table. Compare fuel pressure to specification. Go to next step.REGULATED FUEL PRESSURE (VACUUM APPLIED)
Applied Vacuum In. Hg Fuel Pressure psi (kg/cm2 ) 0 43 (3.0) 5 40.5 (2.9) 10 38 (2.7) 15 35.5 (2.5) - Increase pressure as specified in REGULATED FUEL PRESSURE (PRESSURE APPLIED)
table. Compare fuel pressure to specification. If fuel pressure is not as specified, replace fuel pressure regulator and retest system.REGULATED FUEL PRESSURE (PRESSURE APPLIED)
Applied Pressure psi (kg/cm2 ) Fuel Pressure psi (kg/cm2 ) 0 (0) 43 (3.0) 3.0 (0.2) 46 (3.3) 6.0 (0.4) 49 (3.5) 8.5 (0.6) 51.5 (3.9)
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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