How can I diagnose and fix a misfiring cylinder in my Vauxhall Mokka?

I noticed my Vauxhall Mokka is running rough and I suspect a misfiring cylinder. How do I diagnose which cylinder is misfiring and what steps can I take to fix it?

Hi Ethan, a misfiring cylinder can be caused by a variety of issues including a faulty spark plug, clogged fuel injector, or even a damaged ignition coil. I suggest starting by checking and replacing any worn or damaged spark plugs. If that doesn't solve the issue, you may need to have a mechanic test the fuel injectors and ignition coils.

Hi Ethan, another possible cause of a misfiring cylinder in a Vauxhall Mokka is a vacuum leak. Inspect all vacuum hoses for cracks or leaks and replace as necessary. You can also try cleaning the throttle body and mass air flow sensor. If the issue persists, a diagnostic scan may be needed to pinpoint the exact cause.

Hi Ethan, in addition to the previous suggestions, I recommend checking the fuel pressure and replacing the fuel filter if it hasn't been changed recently. Low fuel pressure can also cause a cylinder to misfire.