Customer complaint: Enjin semput-semput, check engine light menyala.
Diagnosis awal jumpa spark plug salah model, tapi walaupun tukar yang betul, silinder 1 masih misfire & fault code too lean.
Lepas buat compression test, baru kantoi…
Coolant leaking masuk cylinder 1. Bila crank enjin, terus nampak air pancut keluar dari spark plug hole.
Next step: buka head untuk pemeriksaan & repair.
Inilah pentingnya diagnosis betul-betul, jangan terus teka parts.
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