Electrical Electrical drain driving me crazy

[Blown88GT]

Yep, I did all that and the draw was still there.

You never said how many amps the drain is.
Pin-1 on EEC is KAM (Keep Alive Memory), it's hot all the time.

 

[Mstng93SSP]

I shouldn't say this as I will jinx the living F outta myself, but I think I got it. While checking the ECU I found a lovely sct chip installed. Although I was worried about the 250 horsepower I would lose by removing it....I removed it. Car sat since Friday and fired right up today. Hoping somehow this was my culprit. Time will tell.....

 

[Mstng93SSP]

Car actually runs better without the chip....

 

[Blown88GT]

It appears that the SCT module needs power to keep it's memory. I think the newer ones might use flash memory.
I know some of the J3 port devices have battery backup (Quarterhorse). One reason I never went that route.