Fixing all your keys
AO Silver Member
Join Date: Mar 2001
Location: United Kingdom
County: Tyne and Wear
Re: Extra Fuel to drive???
The trouble is that it could be a lot of things.
Does it sound like it is misfiring? It could be water or oil in the spark plug tunnels. Have a look under the bonnet, take off the spark leads one at a time (engine OFF) and look down the tunnel with a torch. The tunnel should be dry but often #1 fills with oil or water and needs cleaning out.
Other than that your symptoms are too vague and you should probably go to a garage.