I'd do a compression test first. As that will give you a good indication of the health of the individual cylinders. I would then, regardless of the test, pull the throttle body and clean it. It isn't hard to remove, just hard to see. The SS definitely has one. I cleaned mine and put the butterfly back in either upside-down or backwards(that's a definite NO NO) When I tried to start the car went into limp mode instantly. I'm not seeing any TB codes you reported. But it could also be a bad connection as ol' blue mentioned.

If you get through the compression test and want to check your throttle body you can shoot me a PM or just ask. I'll get you a quick how to on removing it. It can probably be done in 30 minutes or less with only a 10mm wrench and/or socket and that's it. (Oh, and you'll need pliers to remove the upper radiator hose)

 

I'm confused also. All I know is that when i pulled the ABS fuse the misfire disappeared. I still hear and feel a very slight miss at idle but no more cutting out while driving. My traction control light, ABS light and brake light are all lit now but there is no misfire. Those light were not lit previously.

I was kinda thinking that maybe there is a short somewhere in the ubec that involves the abs and some sort of engine control causing the misfire. Like an arc between the two or something. I don't know. I'm going to call the mechanic and speak with him about it. See what he thinks.

I have not split the UBEC halves. Maybe that will be my next project when time permits.

You mentioned the valves...I am hearing a strange rattle that kinda reminds me of spark knock. I haven't pinpointed the source of the noise though. I was thinking maybe it needs a new timing set. IDK Thanks for all the input!

 

Variable Valve Timing valves (solenoids), not valves. But rattle especially when cold could be timing chain, guides etc.

 

Some of the rattle you hear is the DI injectors themselves, they make it sound somewhat like a diesel.

 

It never rattled before. Just one day it started. And has become louder

 

Sounds like the timing chain tensioner is shot, and or the guides!
I'd replace the chains and guides and sprockets, and while you're in there the water pump

 

Great idea old blue

 

I keep thinking I should change mine, I'm at 200,000 miles and the chains were changed at 58,000 miles I changed the tensioner at 87,000 miles and it isn't noisy so fingers crossed!