Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Monitoring Process
A new function for pre-filtering of sensor wheel segment duration signal is introduced to Sephia in order to enlarge them is fire monitoring range. The sensor wheel segment duration is pre-filtered by this function and then the filtered value is used to calculate the engine roughness which is compared with the reference value to detect misfiring. With this function, it is possible to eliminate the influence of the crankshaft-synchronous oscillations on the detection of misfire. These oscillations can be caused by sensor wheel tolerance or crankshaft torsional vibration. The misfire monitoring of Sephia covers nearly the full range of engine operation in case of random or continuous misfire, and for symmetrical misfire.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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