Electronic questions

[68chevy]

I have a 68 Chevy that is driving me nuts. I am having a intermittent problemswith the ignition system. It starts sometimes but ussually does'nt.

I am pretty limited as far as mechanical skills go. The problem I am seeing when its not working is: I don't get spark while I am turning the key but when I back the key to the off position I get spark.

I replaced the ignition(where the key goes) and nothing, I replaced the MSD 6A ignition system and the problems still there. I replaced the starter cable which had a slice in it, nothing. We have traced all the wiring and it looks good.

My next geuss is to replace the coil, if that does'nt work then I can try the distributer.
This is aggravating because I keep tossing money at this thing yet the problem is still there. Anyone have any clues as to why I am having this problem?

Here is a link with pics of the truck! http://sacbots.com/68chevy.html

[Itstali25]

Yeah definately try the coil, I was having ignition problems with my 86 and ended up being the ignition module, but i didn't figure that out until i had already replaced half of the distributor, cap, rotor, coil, etc. Keep us updated on how it goes

[chevyguy]

Definately an electrical short. Spark should not be present unless the key is in th ON position unless you have a wiring problem, Coil and module do not generate electrical voltage, they simply convert and time the signal. Not in either one of these components.