Thanks, paper clip method works really well - first got 12 (maf) and nothing else. Cleaned afm with brake cleaner, did test again then got 21 (ignition), tried again, 21, tried again, 21, tried again, 55 (wtf!), tried again, 21. Can anyone tell me what to do now? The car sometimes does not start, makes an electrical clickety click noise, starter motor? Hitting it with the tyre iron seems to get it to start (or it could be coincidence).