[url="http://www.holtsauto.com/products/group/additives/petrol"]Redex Link[/url] Happend me before mate redex is great but always read the label for dosage instructions, turn key and stamp/Pump the accelerator like your pumping up a balloon, the mistake i made was throwing in the whole bottle of redex lol didnt realise and took it for a spin down the road when i checked my mirror their was a trail of white smoke everywhere like a jet engine but great stuff when dosed properly, id try this before resorting to a fuel filter as they can be difficult to get sealed properly, and also the redex will break down the gunk in the petrol tank its self as replacing the filter will still leave gunk in your tank