Engine Performance (A8)Câu 100 / 120
In a modern coil-on-plug ignition system, each coil:
a.Powers all cylinders at once
b.Is triggered by a mechanical distributor
c.Stores fuel for injection
d.Fires the spark plug directly on its cylinder, controlled by the PCM
Giải thích
Coil-on-plug systems place an individual coil at each spark plug, fired by the PCM through the ignition driver, eliminating plug wires and the distributor. This improves spark control and misfire diagnosis. A failed coil typically causes a cylinder-specific misfire code.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Technician A says a rich air-fuel mixture can raise tailpipe CO and HC. Technician B says the oxygen sensor helps the PCM keep the mixture near stoichiometric. Who is correct?
- Technician A says the MAF sensor measures the mass of air entering the engine so the PCM can meter fuel. Technician B says a dirty MAF can cause hesitation and fuel-trim errors. Who is correct?
- A P0420 code (catalyst efficiency below threshold) most often indicates:
- A knock sensor allows the PCM to:
- The EVAP system is designed to:
- A loose or missing fuel cap most commonly sets which type of code?
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với ASE Automobile Certification Series (A1–A8) · Quy trình kiểm tra