help car mis firering

[GTi Kid]

hello guys i need a bit of help. on the way home from inters today. my mk2 golf gti 16v started to mis fire. if you traval along at 80mph then boot it it coughs and splutters. but if you gently speed up it is ok.
it has now started to do this at low speeds. any ideas

[Gambit]

it needs a decent tune up

[Mixologist]

Does it do it under a load, say when you got a load of mates in the car???

If so check your sparkies and HT leads, if there screwed, it normally makes that happen

[GTi Kid]

no it happends with one person in it. i drove it today and it was fine
i was told it might be the fuel pump in the tank but we will have to see.

[buzzby]

As  Mixologist has said it could be some nackered spark plugs. This could be true if it has happened after you spend a day thrashing the car. If they looked naff, check back of a hynes manuel, they get some new performance ones with 3 prongs.

Let us know what the problem was in the end

Buzz

[Veedubgt18v]

could be vacuum leak at the throttle body, check all air/vacuum lines and gaskets