Thanks Speck for your valued input on this thread, it has been most appreciated. As i originally advised, this is a learning exercise for me, and with the help i've received i have learned new ideas about diagnostics.

Hi Speck, I've had a good look through the buffer files this afternoon after posting the last post. I agree with you that the spike is triggered exactly at the point of ignition taking place, although I'm not sure how reliable that spike can be taken when reading through the buffer files. When readi...

Hi speck, I did observe that spike previously, I did put it down to a noise type spike due to other ignition coils and injectors triggering, but my tests on cylinder 1 don't have an ignition coil fitted at the time of testing. In any event given the WPS transducer is being used to show TDC, the spik...

Hi Speck, I have a spark tester, however it depends what type of spark tester you are referring to! I still can't get my head round how I'd connect the spark tester to the scope if I have not got a free channel! With regards the scope trace for the crankshaft, maybe this time I have back probed the ...

hi speck, if another channel is not required how would i do it without loosing a channel input?

here is my latest attempt. i do wonder about the scaling of the signatures, after all it is a voltage/time graph!

I managed to find a bit of spare time this evening to have another look at this correlation, timing and fueling. As you rightly pointed out I was thinking that TDC is where the missing teeth are on the flywheel, how wrong I was. How have I got a better understanding of what is happening in the cylin...

I having real problems posting replies to my own threads, last night over 30 attempts and I gave up, this evening one reply and then tried replying to another of my threads repeatedly and I can't post. Is there a set lock down time to stop posting on the forum or is there a fault with the software! ...

Thanks RYM, this is all new area of understanding at the moment but I'm sure the penny will drop fairly quick with a bit more use and experience using the scope.

Thanks Volrem I'll have another look at the scope trace and read through your post again and follow it through.

Thanks for the clarification Volrem. With regards the injector voltage you advise is negative, as that voltage is rising vertically, would that not be positive rather than negative?

If I'm misunderstanding that please advise how it is being read!