ray10 Posted February 22, 2010 Share Posted February 22, 2010 My battery went flat over the winter and I have recharged the battery. Now I turn the ignition on, start the car but turning the key off makes no difference - it just keeps running. I have to use the cut out switch to stop it. Also turning cut out switch back on and then turning ignition on - if I turn the ignition off with the key it then stays on. Any ideas? Or is recharging a flat battery nothing to do with it and it is something else? ☹️ Caterham Roadsports B Link to comment Share on other sites More sharing options...
shn7 Posted February 22, 2010 Share Posted February 22, 2010 Can't imagine it's anything to do with the battery discharge/charge. Have you disconnected anything and maybe reconnected the wrong way? Steve. Not forgetting Percy the Polar Bear who recommends Puddle Pet Care Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted February 22, 2010 Share Posted February 22, 2010 How about wires shorting on back of ignition switch ? Met someone who had a very early Lotus 7 that had to sleep in it overnight. On waking, he started the engine and the wiring loom caught fire. Turned out be had pushed wires/connectors together on back of switch (with his knees) and caused a short with ignition on. Link to comment Share on other sites More sharing options...
ray10 Posted February 23, 2010 Author Share Posted February 23, 2010 No I haven't disconnected / reconnected anything and wires on back of switch seem OK. Could it be a fault has developed in the ignition switch itself? Caterham Supersports Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted February 23, 2010 Share Posted February 23, 2010 Always possible. Link to comment Share on other sites More sharing options...
jackb_ms Posted February 23, 2010 Share Posted February 23, 2010 I have a similar issue, I think When I turn the ignition off, the engine will keep running for about 30s to a minute until it splutters and die. Very stange, and I still haven't find out why, but I presume there is an electrical issue somewhere. Jack Emily, The Very Yellow 21 Link to comment Share on other sites More sharing options...
Graham King Posted February 23, 2010 Share Posted February 23, 2010 Jack, is yours a K-Series, if so check to see if the symptoms you describe happen when the fan is running when you switch off, if so then don't worry about it, this is a well documented "issue" and isn't the result of a problem just the way things work. Graham. R7 GPK Superlight #85 Link to comment Share on other sites More sharing options...
jackb_ms Posted February 23, 2010 Share Posted February 23, 2010 It happens all the same when the fan is running or not. I think there is an electrical issue and I just don't know where to start Jack Emily, The Very Yellow 21 Link to comment Share on other sites More sharing options...
JoukoP Posted February 23, 2010 Share Posted February 23, 2010 I would assume that the ignition switch is faulty so it doesn't switch off properly, either by leaving the contacting points physically connected or creating an electric arc, so the current stays on even if the switch is not making a proper contact. The latter could be the issue with Jack's car since it dies eventually. Cheers Jouko Link to comment Share on other sites More sharing options...
Bob_Rich Posted February 23, 2010 Share Posted February 23, 2010 HI Sounds an odd one if in some way the engine running is allowing the alternator or maybe the fan to produce enough power to keep the engine system going going try switching off the engine with side lights and full headlights on. If this kills it quicker then it is some form of regeneration. Has this suddenly started or has it allways been the same?? Hope this helps best of luck Bob Link to comment Share on other sites More sharing options...
ray10 Posted February 23, 2010 Author Share Posted February 23, 2010 I'm getting somewhere now - although I have no idea what the problem is. It is something to do with the immobiliser. Previously when I switched on the ignition I had to hold the immobiliser fob on the key ring up behind the switch until it clicked and you could hear the fuel pump start. Now I don't need to do that - in fact I took the fob off the key ring and left it in the house and the car will still start. Any ideas??? Caterham Supersports Link to comment Share on other sites More sharing options...
Johnty Lyons Posted February 23, 2010 Share Posted February 23, 2010 There is NO problem with engine running on for 30secs or more on any K it's a std feature of the ECU which had a direct feed NON ign controlled so switching off the ign does not kill the ecu only signals it that You have requested an engine stop It always gets round to doing it but it' s computer and likes to do things it's own way It won't be rushed 😬 jj MTM , N.I. L7C AR 🙆🏻 Membership No.3927. 240BHP 1900cc K Series 40th Anniversary Link to comment Share on other sites More sharing options...
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