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Volkswagen golf
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my car has a 'flat spot' at 300rpm very noticeable under half load, what could it be
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For more on marking an answer as the "Best Answer", please visit our FAQ.I assume you mean 3000rpm. If it is an older model, check the vacuum advance on the distributor. This basically adjusts the the timing at different speeds using a vacuum system. It's usually a black rubber pipe that pushes on near the distributor. If it has a hole in it or is off altogether, it can affect your timing.