Problem yesterday - car sluggish up a long hill, then heard a rattle, then the revs kicked in & went up & up & up - key out - engine still running, had to stall it! After 15 mins started it again, on idle for a few seconds then off it raced again & had to stall to stop. After a scary tow, am just waiitng to find out what the problem is - any ideas? Thanks NKP