Diagnosis

Misfire Diagnosis: Coils, Plugs, Injectors, or Compression?

A structured way to think about misfires on German cars, from ignition basics to fuel delivery, air leaks, and mechanical compression faults.

Misfire Diagnosis: Coils, Plugs, Injectors, or Compression? A misfire means one cylinder is not producing expected combustion. The cause may be ignition, fuel, air, timing, or mechanical compression.…