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A quick look at a faulty idle control valve on my Ford Escort 1.8 Ghia.

The symptons will be very similar across every Car, especially Ford.

This particular car is my Ford Escort Ghia Cabriolet 1.8 - Year 1997

A video of me replacing the ICV can be found here:

Obviously do not even attempt this replacement if you are not a competant mechanic.