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Re: Warning light on a Y reg clio
The drop of clear substance on number one spark plug seems strange. Assuming it hasn't been contaminated during removal something sounds amiss. There is a possibilty it may have been condensation from a leaking head gasket.
Obviously it seems the engine is misfiring and unburnt fuel is entering the exhaust - hence the toxic fume warning light. A compression test or chemical test of the coolant may reveal more.
Currently in madnoel10's garage:
Honda Civic 1.4l