mjhunt8138

Hi when driving along if I put my foot down to pick up speed it gets to a certain rpm about 4000 and then losses power for a secound and then speeds up again all the time . And when at stand still if you put your foot right down again the revs go up and down it will go to 4500rpm then drop to 4000rpm. Please help (vw fox 1.2cc 3 cylinder 06 plate)