Just because you can see a spark at the plugs doesn't mean you will have a spark under compression. More HT is needed to create a spark in the engine due to the gas density (related to compression & mixture) in air less voltage is needed to get a spark. If you disconnect the king lead to the distributor & cautiously hold it so that the wire is about 1/4 in from a metal point on the block then flick the points you should get a spark. I can get about 1/2 in doing this, if it is much less than 1/4 in you may not have enough voltage for a spark under compression.
The other thing is you should not see a great spark at the points, it is the function of the capacitor to absorb this. By minimising the spark there you not only reduce wear at the points but you have a more abrupt shut off of supply to the coil, that will mean a more rapid collapse of the magnetic field giving a greater HT output.
 
Still under investigation , garage cannot sus it , makes me feel a bit better though , id feel a bit of a Divvy if it was something obvious.
 
Please give a full update. This is one of the most intriguing threads we've seen. I want the garage to come up with the engineering answer
 
Can't believe a garage can't sort this after this length of time (unless it's a Land Rover main dealer)
Perhaps they are looking for the diagnostics plug!
 
P_20160120_111128.jpg
 
I can feel the bill getting heavier by the second. All that ink. :eek:

I cant think of anything that takes this long to trace on a series. Perhaps a squirrels nest in the chassis. o_O
 
fv1620 said:
Just because you can see a spark at the plugs doesn't mean you will have a spark under compression. More HT is needed to create a spark in the engine due to the gas density (related to compression & mixture) in air less voltage is needed to get a spark. If you disconnect the king lead to the distributor & cautiously hold it so that the wire is about 1/4 in from a metal point on the block then flick the points you should get a spark. I can get about 1/2 in doing this, if it is much less than 1/4 in you may not have enough voltage for a spark under compression.
The other thing is you should not see a great spark at the points, it is the function of the capacitor to absorb this. By minimising the spark there you not only reduce wear at the points but you have a more abrupt shut off of supply to the coil, that will mean a more rapid collapse of the magnetic field giving a greater HT output.
Click to expand...

Just because you can see a spark doesnt mean you have spark plugs. My diesel wiring sparks all the time. Especially when I wire something in it. :D
 
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