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how to fix hydrolocked diesel engine
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1. Get inside your BMW, close the door and buckle your seat belt.
2. Insert your key into the ignition without starting the car.
3. Press down on the gas pedal to the floor 5 times within a 5-second span.
4. Remove the key.
5. Press and hold the "Trip" button on the instrument panel until the red light comes on.
6. Press the "Trip" button a second time and hold until "Reset" appears.
7. Press the "Trip" button a third time. The BMW computer runs a self diagnostic on the sensors which monitor emissions output.
Please note that if the issue that caused the check engine light to come on in the first place has not been resolved, the light may come back on and you may need to get your car diagnosed.
Additionally, different BMW models might have slightly different procedures, so it's always a good idea to check your owner's manual, or contact a BMW dealership or trusted mechanic for guidance.
For the newer BMW models it is often necessary to have a code scanner tool to reset the check engine light.
To keep a diesel engine warm in winter, utilize a few strategic methods. First, consider using a block heater, which keeps the engine’s coolant warm, reducing the viscosity of engine oil for easier starts and immediate lubrication. Parking in a sheltered area reduces exposure to freezing temperatures. Also, using thinner, winter-grade oil can improve flow at lower temperatures. Fuel additives prevent diesel from gelling in cold. A battery warmer maintains the battery’s optimal performance, essential for cold starts. Additionally, running the engine periodically if not in daily use keeps mechanical components lubricated and prevents the battery from draining. These steps ensure your diesel engine remains functional and efficient during the colder months, safeguarding its longevity and reliability.
To prevent engine flooding—a problem often seen in carbureted cars when excessive fuel fills the engine cylinders, preventing ignition—start by ensuring your vehicle is properly maintained. Regularly check the spark plugs, air filter, and fuel injectors (for fuel-injected engines) as these can influence the fuel-air mix. If you suspect flooding (characterized by a gas smell and difficulty starting), avoid pressing the accelerator while starting. This helps clear excess fuel from the cylinders. In fuel-injected vehicles, pressing the accelerator while starting signals the control unit to cut fuel to the engine, helping to clear the over-rich mixture. Remember, patience and proper maintenance are key; if the engine doesn’t start after several tries, wait a few minutes before attempting again to avoid damaging the starter motor or depleting the battery.
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