Fluctuating tickover.

Audi A6 1995, 1984cc, petrol, manual. - Sometimes has: fluctuating tickover, lumpyness and hesitation. Does anyone know the reason(s) and the cure(s)? Does anyone have a fuel system drawing?

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Best to check for any error codes but if I were to take a guess I would suggest checking for a vacuum leak.
Schod wrote:

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