David Mirylees Posted January 16, 2013 Share Posted January 16, 2013 On my twin cam Europa, every time the car is started when cold, the ignition light stays on until engine is revved/blipped over 3000rpm. Once warmed up the problem doesn't reappear. Obviously not the best thing to rev a cold engine on it's first starts All help, as usual, much appreciated... Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted January 16, 2013 Member Share Posted January 16, 2013 This was discussed recently: should be in the archives. This might be what I remember. Jonathan Edited by - Jonathan Kay on 16 Jan 2013 15:08:05 Link to comment Share on other sites More sharing options...
David Mirylees Posted January 16, 2013 Author Share Posted January 16, 2013 Great - thank you for the link, I searched but obviously missed that one! Looks like the Diodes then - no ECU on this old 1972 Europa... Link to comment Share on other sites More sharing options...
johnnyseven Posted January 16, 2013 Share Posted January 16, 2013 David, my car does that ever since I put a smaller diameter alloy crank pulley on. Link to comment Share on other sites More sharing options...
halstock Posted January 16, 2013 Share Posted January 16, 2013 So you two spend half the evening together last night then come on here to discuss your tecnical issues ? Thanks to the Dorset crew for a warm welcome last night and not insisting on EVERY grisly detail of my tribulations. Looking forward to getting out and about with you all when my car arrives and the weather improves a touch. Andy Link to comment Share on other sites More sharing options...
David Mirylees Posted January 16, 2013 Author Share Posted January 16, 2013 John, Why would the crank pulley affect the alternator? (probably my dementia, I know...) Andy, Didn't seem to be any time to mention the cars, past lives and some umentionable historic anecdotes took over! Good decision to leave the 7 at home - far too icy for any playtime with the toys last night. Great to meet you and looking forward to seeing the new 7. Link to comment Share on other sites More sharing options...
Burwell7man Posted January 16, 2013 Share Posted January 16, 2013 Hi David Its not the voltage regulator sticking is it?Repairing voltage regulator May have burnt faces on the contacts? Link to comment Share on other sites More sharing options...
johnnyseven Posted January 16, 2013 Share Posted January 16, 2013 David, I thought it might have to do with the speed at which the alternator is spinning over-- like yours a blip of the throttle and the light goes out. Andy, nice to meet you a last, hope you were'nt put off by our relaxed attitude 😬---your new car sounds like it has the right bits already on it Link to comment Share on other sites More sharing options...
halstock Posted January 17, 2013 Share Posted January 17, 2013 Johnny, the relaxed atmosphere was most welcoming and just to my taste. I've since found out from Caterham that my car has had the Supersport upgrade to c135 bhp, as John and I suspected, but for which we had no proof. Another little bonus for me. Looking forward to driving to those meetings in the 7 when the weather improves, and joining you on some Dorset group blats. Andy Link to comment Share on other sites More sharing options...
garybee Posted January 17, 2013 Share Posted January 17, 2013 Quoting David Mirylees: John, Why would the crank pulley affect the alternator? (probably my dementia, I know...) A smaller diameter crank pulley means that less belt is moved for every turn of the crank. This means that the alternator (and other accessories) isn't being spun as quickly as would otherwise be the case. Link to comment Share on other sites More sharing options...
David Mirylees Posted January 17, 2013 Author Share Posted January 17, 2013 Thank you for the responses. No visible Voltage Regulator on the car (I remember playing with those in the good old days!!) so the regulator must be inside the alternator. Apologies about the crank diameter - I wasn't thinking about normal cars and the alternator drive The Europa has an independent drive from the inlet camshaft... Link to comment Share on other sites More sharing options...
johnnyseven Posted January 17, 2013 Share Posted January 17, 2013 Garybee has explained the pulley query Andy. 135 is plenty-- the original superlights pushed that power out and they are quick and well balanced---so no excuses there then 😬 Link to comment Share on other sites More sharing options...
Johnty Lyons Posted January 18, 2013 Share Posted January 18, 2013 The voltage regulator linked to is for a DC Dynamo and is a relic of a bygone era. AC alternators with built in rectifiers/regulators are all you ever see on modern cars. Different story if we where looking at a Classic. Link to comment Share on other sites More sharing options...
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