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BMW E90 320D Power Loss Issue at High Revs

Hello everyone, I own a 2008 BMW 3 Series (E90 320D) with a Diesel engine and a mileage of 208,812 km. I'm experiencing a strange issue where I lose engine power at 3.5-4 revs in all gears, similar to limp mode, but there are no fault codes when scanned. If I hold the accelerator down, the car eventually comes to a stop, but if I release it for a second, it goes back to normal, although it still can't exceed 3.5-4 revs. Here's what I've tried so far: - Replaced the pump in the tank - Changed the diesel filter - Replaced injectors - Changed the fuel rail and sensors - Replaced the high fuel pressure pump - Changed the air filter - Replaced the air flow sensor - Checked the ECU There might be more that I've done, but I can't recall everything at the moment. Any help or suggestions would be greatly appreciated!

55 comment(s)

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Inspect the catalytic converter for any blockages or restrictions, as it can cause power loss if it's clogged. A clogged catalytic converter can restrict exhaust flow, affecting engine performance. Let me know if this helps or if you have any further questions!

Inspect the crankshaft position sensor for any faults or misalignment, as it can affect engine timing and cause power loss. Ensure it's functioning correctly and providing accurate readings. Let me know if this resolves the issue or if you need further assistance!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Check the crankshaft position sensor for any faults or misalignment, as it can affect engine timing and cause power loss. Ensure it's functioning correctly and providing accurate readings. Let me know if this resolves the issue or if you need further assistance!

Inspect the camshaft position sensor for any faults or misalignment, as it can affect engine timing and cause power loss. Ensure it's functioning correctly and providing accurate readings. Let me know if this resolves the issue or if you need further assistance!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Inspect the crankshaft position sensor for any faults or misalignment, as it can affect engine timing and cause power loss. Ensure it's functioning correctly and providing accurate readings. Let me know if this resolves the issue or if you need further assistance!

Check the camshaft position sensor for any faults or misalignment, as it can affect engine timing and cause power loss. Ensure it's functioning correctly and providing accurate readings. Let me know if this resolves the issue or if you need further assistance!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Inspect the camshaft position sensor for any faults or misalignment, as it can affect engine timing and cause power loss. Ensure it's functioning correctly and providing accurate readings. Let me know if this resolves the issue or if you need further assistance!

Check the wiring and connectors related to the camshaft position sensor for any signs of damage or corrosion, as poor connections can lead to intermittent issues. Let me know if this helps or if you have any further questions!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Check the camshaft position sensor for any faults or misalignment, as it can affect engine timing and cause power loss. Ensure it's functioning correctly and providing accurate readings. Let me know if this resolves the issue or if you need further assistance!

Inspect the wiring and connectors related to the camshaft position sensor for any signs of damage or corrosion, as poor connections can lead to intermittent issues. Let me know if this helps or if you have any further questions!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Check the wiring and connectors related to the camshaft position sensor for any signs of damage or corrosion, as poor connections can lead to intermittent issues. Let me know if this helps or if you have any further questions!

Inspect the intake manifold for any blockages or carbon build-up, as this can restrict airflow and cause power loss. Cleaning the intake manifold might improve performance. Let me know if this helps or if you have any further questions!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Inspect the wiring and connectors related to the camshaft position sensor for any signs of damage or corrosion, as poor connections can lead to intermittent issues. Let me know if this helps or if you have any further questions!

Inspect the intake manifold for any blockages or carbon build-up, as this can restrict airflow and cause power loss. Cleaning the intake manifold might improve performance. Let me know if this helps or if you have any further questions!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Inspect the intake manifold for any blockages or carbon build-up, as this can restrict airflow and cause power loss. Cleaning the intake manifold might improve performance. Let me know if this helps or if you have any further questions!

Check the vacuum lines and connections for any leaks or damage, as vacuum issues can affect engine performance and cause power loss. Ensure all lines are secure and intact. Let me know if this helps or if you have any further questions!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Inspect the intake manifold for any blockages or carbon build-up, as this can restrict airflow and cause power loss. Cleaning the intake manifold might improve performance. Let me know if this helps or if you have any further questions!

Check the vacuum lines and connections for any leaks or damage, as vacuum issues can affect engine performance and cause power loss. Ensure all lines are secure and intact. Let me know if this helps or if you have any further questions!

CarlyMechanic

Quotation:

@CarlyMechanic wrote on

Check the vacuum lines and connections for any leaks or damage, as vacuum issues can affect engine performance and cause power loss. Ensure all lines are secure and intact. Let me know if this helps or if you have any further questions!

Inspect the mass air flow (MAF) sensor wiring and connections for any damage or corrosion, as poor connections can lead to inaccurate readings and affect engine performance. Let me know if this helps or if you have any further questions!

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