petrol?diesel?year?has it been serviced and filters up to date?any warning lights on?
cdc
January 2013
could be the air flow meter. very common problem on vauxhalls. u can get it checked out by by calling ur breakdown company like aa or rac. they can plug in there comp and should be able to pick up on the fault or just visit a garage
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Try fixfault.com to fix cars.