[Vwdiesel] Apologies to Roger

[Mark Shepherd]

I've reread your posting and its logic is converging with my
own.

I think if we can take a good reading 'X' between #2 and #1
then with all plugs good;  voltage will be double 'X'
between #3 and #2 and triple 'X' between #4 and #3.
I shant work out the 'dead GP' combinations as this is
workoutable...
Sorry Roger..

BUT here's another 'bone'
  A week ago I had a glowplug die and then having replaced
it 2 others died 2 days later :(
It has been said on this forum that GP death is probably not
linked save for general communal aging... If these plugs are
rated at 11 Volts and whilst 4 are loading the battery and
starter cranking is also dragging the battery down applied
Volts are not too far above this. If a plug dies however
then what effect does this have? 0.25 of a volt? Thats some
5 % extra power applied to the remaining plugs.. and if 2
were to die how much brighter is the interior light? maybe
0.5 Volt? or 10% more power to the last plugs...?
So maybe this is telling me that I should always change all
plugs when one or more dies??
Mark(The Miser)UK