[CharlesJones]

Thanks very much for all you input and suggestions. I can see I wasn't testing power to the coil at all then - I just really hope I haven't damaged anything in doing so.

Thanks for the explaination of how the DME fires the coil Doug. I will try testing for voltage to pin 15 like you suggest, and if its getting power I will connect a test plug to the output of the coil to see if that is giving a spark. At the moment I have tried a test plug (i.e. spare spark plug grounded against the inlet manifold) in one of the HT leads and am not seeing any spark there. If I getting power to the coil but no spark from the output of the coil, I will try testing the coil like you suggest. If the coil is good perhaps I should just replace those speed sensors - it sounds like that would be good preventative maintenance even if they are not culprit anyway.

Yeah, I tried a spare DME relay but that didn't make any difference. I also tested the fuel pump by touching 12 volts to the fuel pump fuse, and I could hear it spin. I tested for voltage at this fuse with a multimeter during cranking, and can see its getting about 9 and a half volts (not sure why it isn't 12 volts).

I have read that the fuel pump should only operate during cranking, and not with just the ignition key switched to on, but before this problem I am sure I used to hear something whirr when I switched the ignition key to the on position prior to cranking. Now when I switch it to on I don't hear anything. I feel the ICV valve buzzing if I put my hand on it with the ignition on, by the way - not sure what that tells me, but I know it is expected behaviour.

I haven't yet verified that I am getting fuel. I can't smell any fuel at all in the engine bay, so I am guessing I probably am not. With an LED test light do I plug one of the injector wires into it to check for a pulse? Sounds like a very useful bit of equipment - I will try and purchase one tomorrow.

Thanks again for all your input. I have a good few more diagnostic tests to try - I will report back what I find.