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.
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HOMESERVICE MANUALSSAAB20029-3 SE, 2D CONVERTIBLE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL SYSTEMFUEL PRESSURE & FLOW TESTSCHECKING INJECTOR FLOW CAPACITY (9-3)
2002 Saab 9-3 SE, 2D Convertible, Automatic
Checking Injector Flow Capacity (9-3)
2002 Saab 9-3 SE, 2D Convertible, AutomaticSECTION Checking Injector Flow Capacity (9-3)
CAUTION:
The utmost cleanliness must be observed when handling the fuel rails and injectors. Wash around the injectors, fuel rail and intake manifold and dry with compressed air.
- Remove the fuel rail.
- Attach the fuel connections to the fuel rail. Fit a transparent hose to the nozzle. The hose should be approx. 40 cm long with an inner diameter of 15 mm. See Fig 1 .
- Direct the hose into a receptacle/measuring glass.
- Plug in the connectors to their respective injectors.
- Start the fuel pump by connecting Diagnostics Cable, LH System, Jumper Lead (83 93 886) between the lower pin of fuse 32 for the fuel pump and the upper pin of fuse 4 for the luggage compartment lighting.
- Conduct the flow capacity test using the diagnostic tool. The diagnostic tool will then activate the injector in question with battery voltage for exactly 30 seconds. See Fig 2 .
- After 30 seconds, the amount of fuel should be 176 +/- 7 ml. The difference between injectors must not exceed 14 ml.
- Change any defective injectors.
- Disconnect the fuel line connections from the fuel rail and fit the fuel rail.
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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.