It was indeed a vacuum leak, but a very strange one considering it'd get through -more- fuel than it should, mainly because it was adjusted so high at idle to get around the leaks. All the injector seals were rock hard and the injectors weren't held in by much more than gravity. The intake manifold had had too-long a bolt installed at the back edge and had actually peeled back one of the core plugs causing a slight leak there. We've got more intake manifolds than you can shake a stick at so we just fitted a spare one, which neatly solved the problem of the stripped threads at the air-horn end too. New soopa doopa injector seals (see website :-) and a new metering head and intake venturi as part of the Stage 1 anyway, and now the clutch does indeed slip quite enthusiastically. Not the first one to have had performance mods which then highlighted a dodgy clutch! MOT only failed on handbrake, although he did frown at the fluffy dice.... Martin DMC Ltd Claire Usher wrote: >Martin can explain it better then me > DOC UK Website: www.deloreans.co.uk Unsubscribe: doc-uk-unsubscribe@xxxxxxxxxxxxxxx ** Unless otherwise stated, all messages posted to the group are assumed public and may be printed in the club magazine ** Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/doc-uk/ <*> To unsubscribe from this group, send an email to: doc-uk-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/