Delta, obviously you have a heat related problem through ingition.
Is there adequate space behind the module for cooling the back of the ingition module when it is mounted ?
You have replaced parts you didn't need to.
You need to check the Pick up module in the distributor and look for partially broken or frayed wires leading to the distributor.
How good is the battery for condition ?
DSII requires at least 8.2 volts to operate properly.
SLS,
Instead of typing it out everytime you can use this page which I have access to on my web page.
http://www.fluke.com/application_not...AGID=1&SID=103