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Model specific boards => Golf mk4 => Topic started by: aidan2112 on 26 June 2013, 21:38
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Golf failed its mot on emmissions, both hc and co were well over the limits, engine is a completely rebuilt unit only covered around 10,000 miles and has had two oil and filter changes, plugs and leads too, had a new cat fitted at the same time, coulld this be the lambda sensor packing up?