***UPDATE*** I wanted to post this follow maybe to help others figure this out. As many of you know from my posts, I had an electrical issue I could not figure out all summer. Hope this can help someone else going forward.
Symptoms:
-A couple of random engine misfires.
-Engine light code 656157 (656 15 7) Electronic Throttle Control (ETC) Actuation-Actuation Fault
- Completely random engine starts. Key would turn on, Fuel Pump would prime, engine would turn over and try to start but just time out
- Significant increase in battery draw and discharge
Fix:
Check Engine Fuse Box.
ECM 10A BRKR and Powertrain 20a BRKR were VERY loose in the box. When you place your finger on them you could hear an electrical arc noise as though they were making a connection under the fuse box. I removed the fuse box and checked the connection under, and they looked fine. I tried to spread the female spade connections at the top but there is not much room to do much, even with a fine pin. Again, they were very loose and hardly held the breakers in place. Every movement in the sling would cause them to work or not or send a current draw to the whole sling.
The final repair took 5 minutes. I cleaned and slightly twisted the breaker legs and added some dielectric grease to them before inserting them. After I added a small piece of foam to the top of the fuse box cover to create a little constant pressure on the relays, breakers, and fuses.
Worker perfectly since….
Hope this can help someone with this similar issue or at least rule it out.
Thank you again for all that gave me suggestions and help. I appreciate the Sling Community and how we help one another.