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Why did your Volvo 850 slow down have all the lights on dash come and then stall out you?

Possible Causes:

1. Fuel Pump Failure: A faulty fuel pump can restrict the flow of gas to the engine, causing it to stall. Check the fuel pump for any leaks or damage.

2. Clogged Fuel Filter: A clogged fuel filter can prevent enough gas from reaching the engine, leading to stalling. Replace the fuel filter as per the recommended maintenance schedule.

3. Faulty Ignition System: Issues with the ignition system, such as a worn spark plug or distributor, can cause the engine to stall. Inspect the ignition components and replace any defective parts.

4. Vacuum Leak: A vacuum leak can cause the engine to run lean and stall. Check for any cracks or loose connections in the vacuum lines and repair them accordingly.

5. Faulty Sensors: Failure of sensors, such as the oxygen sensor, crankshaft position sensor, or camshaft position sensor, can disrupt the engine's operation and lead to stalling. Have these sensors checked and replaced if necessary.

6. Electrical Problems: Electrical issues, like a loose battery connection, faulty wiring, or a malfunctioning alternator, can affect the power supply to the engine and cause it to stall. Inspect the electrical system for any problems and fix them.