Gerry
Yea, that does work on some
Tom has a post where he uses a tin foio hat
I can't find it right now though
If the coil has the transistor on top like the Gm trucks or Infinity it gets a bit tricky
You can't get a signal there.
You have to get around the side
Near impossible to do on 4.6 and 5.4 Ford trcks
Those guys are hidden way back there
The probe sneaks in without a bunch of trouble
This infinity was done with a COP wand (or probe)
I could not have accessed the coils without it
http://www.autonerdz.com/cgi/yabb2/YaBB.pl?num=1174843843/1#1I don't use it every day but it sure does come in handy sometimes
Wilf