The way you have tested the wire is OK but you still cannot rule out that the insulation breaks down under high voltage. You will not be able to see if the boot breaks down inside the spark plug well. A better test is to switch the wire with another and see if the trouble moves. If you twisted and pulled on the wire "as hard as you could" you should now throw it away, you have broken the inner core. You cannot use the injector port to check compression, it only goes behind the intake valve, not into the combustion chamber. Get a compression tester that CAN fit into the spark plug hole. If the plug "carbons up" SOMETHING (oil or fuel) is getting on it! David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, S E Ableman <s.ableman@xxxx> wrote: > > List, > > I haven't had much time to work on the #1 cylinder problem. I did > manage to remove the spark plug wire . That wasn't easy, and putting it > back was worse. The wire checks good. It is 452 ohms and 16" long , > made from Taylor 8mm silicon @350 ohms per foot. I have a dc power > supply that goes up to 32 volts. It showed 70 ma current when To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/