04/09/2026
π§ Vauxhall Zafira β Rough Running, Lack of Power & Unusual Engine Noise π§
This Vauxhall Zafira came in with rough idling, hesitation and a noticeable lack of power, along with a loud rattling/ticking noise from the engine bay that initially sounded very similar to a timing chain hitting the rocker cover.
After carrying out diagnosis, I traced the fault to the ignition coil pack arcing directly onto the cylinder head. β‘
The electrical arcing was actually creating the loud noise that sounded like a mechanical engine rattle β a good example of why proper diagnosis is important before replacing parts!
π§ Ignition coil pack replaced
π§ New spark plugs fitted
π» Fault codes cleared
β
Engine tested and running smoothly with full power restored
Another fault diagnosed and repaired without unnecessary parts being replaced. π¨βπ§π
π McIntosh Motor Service
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