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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSSAAB20039-3 CONVERTIBLE (9400) L4-2.0L TURBO (2.0 HOT)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONDETAILED DESCRIPTIONSTARTING FUEL
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)
Starting Fuel
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)SECTION Starting Fuel
Starting Fuel
Pre-injection
When the ignition is turned on, the fuel pump relay will operate for one second to build up fuel pressure.
As soon as the control module detects the crankshaft moving, there will be a simultaneous injection with all four injectors. The amount of fuel injected depends on the engine coolant temperature.
Starter motor cranking
As soon as the control module localizes the large hole in the armature, injection will be based on crankshaft angle.
The fuel quantity is still regulated by engine coolant temperature only and is decreased gradually as starter motor cranking continues.
Injection is interrupted if the accelerator is depressed fully. This makes it possible to rectify a flooded engine.
The engine is considered to have started as soon as the engine speed exceeds 650 rpm and the fuel quantity is then calculated using the mass air flow sensor as the main sensor.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.