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Re: Clio rough start from cold
The amount of time the glow-plug light illuminates doen't actually reflect the amount of time the glow-plugs actually heat. The glow-plugs will normally heat for around 10 to 30 seconds depending on coolant temperature.
The time can be checked using a test light or suitable volt meter.
Currently in madnoel10's garage:
Honda Civic 1.4l