What Causes Misfire in Cylinder 1 of BMW N20 Engine During Cold Start?

1 Answers
DakotaFitz
07/29/25 5:14pm
The causes of misfire can include issues with the spark plug (such as clogging or damage), problems with the cylinder wire, faulty ignition coil, injector issues (such as clogging or low voltage leading to DME internal injector data loss), problems with the air-fuel mixture, and issues with cylinder pressure. Cylinder Pressure: Using a cylinder pressure gauge makes detection straightforward. However, it's important to note that changes in valve spring stiffness and camshaft wear are difficult to detect during cylinder pressure measurement. Additionally, ensure sufficient air intake. Ignition: For diagnosing engine misfires, relying solely on engine data streams may not reveal the issue. Further diagnosis with an oscilloscope is often necessary for accurate judgment.
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