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my BMW 5 Series F10/F11 (2010-2017) turns over but won't start what could be wrong - BMW 5 Series
Home/Cars/BMW/5 Series/F10/F11 (2010-2017)/my BMW 5 Series F10/F11 (2010-2017) turns over but won't start what could be wrong

my BMW 5 Series F10/F11 (2010-2017) turns over but won't start what could be wrong

BMW 5 Series F10/F11 (2010-2017)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
566 words

Problem Statement

The BMW 5 Series F10/F11 (2010-2017) is experiencing an issue where the engine turns over but does not start, indicating a potential problem with fuel delivery, ignition, or elect

Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical systems.
  • •Allow the engine to cool before working near the fuel system to avoid burns.

Symptoms

  • •Check engine light illuminated
  • •No fuel pump noise when the ignition is turned on
  • •Engine cranks but does not start
  • •Intermittent or no spark at the spark plugs
  • •Fuel odor near the engine bay
  • •Battery voltage is low or weak

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II scanner
  • •Multimeter
  • •Fuel pressure gauge
  • •Socket set
  • •Torque wrench
  • •Spark tester

Parts Required

  • •Fuel pump (if needed)
  • •Ignition coil (if needed)
  • •Spark plugs (if worn)

Additional Information

Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
6 items
Parts Required
3 items

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Solution
1. Preparation
  • Gather tools and parts needed for the repair.
  • Ensure the vehicle is in a safe area, and the engine is cool before starting work.
  • Disconnect the negative battery terminal to prevent electrical shorts.
2. Fuel System Inspection
  • Check Fuel Pump:
    • Reconnect the battery.
    • Turn the ignition to the "ON" position (do not start), and listen for the fuel pump. It should run for a few seconds.
    • If silent, remove the fuel pump relay and test it with a multimeter for continuity.
  • Replace Fuel Pump (if necessary):
    • Relieve the fuel system pressure by removing the fuel pump relay and starting the engine until it stalls.
    • Disconnect the battery.
    • Remove the fuel tank access cover.
    • Disconnect the fuel lines and electrical connectors from the fuel pump.
    • Remove the mounting hardware and take out the old fuel pump.
    • Install the new fuel pump in reverse order of removal.
3. Ignition System Inspection
  • Check Spark:
    • Reconnect the battery.
    • Remove one spark plug and reconnect the ignition coil to it.
    • Ground the spark plug against the engine and crank the engine to check for spark.
    • If no spark, replace the ignition coil or spark plug as necessary.
4. Electrical System Check
  • Inspect Fuses and Relays:
    • Locate the fuse box and use a multimeter to check for blown fuses related to the fuel and ignition systems.
    • Replace any faulty fuses and relays as identified.