How hot should the coil get in a crossflow? It's running the Lucas electronic ignition supplied by Caterham in 1987.
Was out for a blat last weekend and the engine cut out without warning. Engine would not restart at all so towed home..
I traced the fault to the coil, which has run well for the past 2 years. When I fitted an old coil (possibly not the correct spec to run with the electronic ignition) the engine started immediately and ran well for 20 miles - when there was a loss of power and misfiring etc - the engine would not rev above 3000 rpm but fortunately I was able to drive it home like this. The coil was too hot to touch.
I have just fitted a Lucas DLB105, which I'm told is the correct one for the ignition. I've just been for a test and it all worked very well - however, again the coil gets very hot, perhaps not quite as hot as before but still too hot to touch really.
Are these temperatures normal? I'm concerned that there may be a fault which is causing damage / overheating to the coil. I've been careful to reconnect the +ve and -ve as before and checked the plugs and leads and distributor cap, all of which look ok.
The new coil seems to work perfectly, the engine running as it should but I don't want to risk going too far if the overheating is likely to cause it to fail again.
Any thoughts much appreciated.