could someone please help
My daughter has a Ka which has a missfire when underload or low revs
the first time this happened I looked online and found out a common problem was water getting into the electrical pins under the bonnet after taking these apart and cleaning them the problem went away great or so I THOUGHT the next time we had heavy rain the problem came back but this time taking these plugs apart and cleaning did not cure this
I have changed the leads and plugs and still the problem is there should I be looking at changing the coil ?
I have to point out I am an electrical / mechanical engineer but not on cars so explenations as where to find relevant parts would be appreciated

Hi, welcome to the site. Try spraying them with a water repellent like wd40.

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