Yes, this book shows which engines need it or not and this is down to the engine size, type code and production number in some cases. The gearbox bloke is right about the sensor. It was moulded onto the bracket. DIY method was to heat the bracket up a bit, melt the plastic slightly and move it along the bracket a bit. NickT. Martin Gutkowski - DMC Ltd <martin@xxxxxxxxxxxxxx> wrote: Our gearbox guy showed us the comical way in which Renault did it on the EFI 25's..... sold everyone a new flywheel sensor which was off-centre on its mounting bracket. Achievable with the old sensor, a vice and a little gentle use of a hammer What I was getting at was distinguishing between engines that NEED lead, and those that simply need the timing knocking back. I suspect John's simply says in the manual that it needs 97 ron leaded to distinguish it from 2-star. Running it today with lead replacement additive is avoiding a simple jaunt with the timing light, as you say. I doubt very much if it's an engine that still needed it. But I'd be interested to know. How long after unleaded did super unleaded arrive? (which brings the octane back up to 97) Martin Nick Tomlinson wrote: >All engines should have been able to run on unleaded petrol from 1986 but there were a few exceptions. > > Showing my age here, I have the Unleaded Petrol Guide printed in 1989 with the data on which cars (of the time) could & couldn't run on it and which needed a timing reset. > > Cost me £3.50 and with a timing light got me quite a few beers at uni. > > NickT. > > 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 --------------------------------- Yahoo! Messenger NEW - crystal clear PC to PC calling worldwide with voicemail [Non-text portions of this message have been removed] 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/