OK, citroen ZX TD volcane - fire it up, almost immediately revs through the ceiling and wont shut off for a few seconds after the key is turned. Any ideas? I'm pretty lame when it comes to diesels, so im at a loss. Ive had the suggestion that it might be the fuel pump - i hope not at 1200£! It revs its little nuts off, rattles a bit and smells really rich. Clues? James