Every schematic I've seen has the ecu pin 1 getting full voltage in the run position with either a single or dual ballast ?
You are right, I meant to the coil + not the ECU. The coil will, at some point went the supply voltage drops too low, not produce enough juice to reliably spark the plugs.
Just wanted to clarify for others as well as make sure I wasn't losing it LOL
I had a customer years ago with a car that would randomly not start. He had taken it to several different shops and a customer recommended bring it to me. They had wired the pin 1 to the wrong side of the ballast
. A 12V component depending on it's mood will sometimes function on the lower voltage and other times not. Temperature and a number of other factors will cause this.
When I was in Final test at intel there were parts that would consistently pass as a bin 1 @125c and drop to a bin2 at 127c, 3 degrees F made the difference. Others would flat fail at the higher temps
