The fuel filter cleans the fuel pumped to the engine from the tank. Over time, the fuel filter can become clogged, restricting the flow of fuel to the engine. This can lead to your Saab 900s suddenly cutting off while driving.
Faulty Fuel Pump
A faulty fuel pump can lose its capacity to deliver fuel to the engine. This can cause the engine to cut off while driving, specifically, when the fuel level in the tank is low.
Faulty Ignition Switch
The ignition switch is vital in the car’s ignition process. A faulty ignition switch can result in the engine turning off while driving.
Faulty Crankshaft Position Sensor (CPS)
In your Saab, the crankshaft position sensor (CPS) is responsible for controlling spark timing and fuel delivery. A faulty CPS can cause the engine to cut off during driving because the engine can no longer receive accurate engine speed information.
Faulty Main Engine Relay (MER)
The MER provides the required power to electronic fuel injection parts as well as the ignition coils. A faulty MER can interrupt fuel and spark supply to the engine.
Faulty Ignition Coil(s)
This is a typical cause for engines that cut off after operating for some time. Over time, ignition coils age and begin to fail, leading to misfiring and, in severe cases, engine shutdown while driving.
Faulty Distributor
The distributor rotates to direct the spark from the ignition coil to the proper spark plug according to the engine's firing order. A faulty distributor can cause the engine to shut down while driving.
