motor help

I got 80k 2003 5.3. I started up for the first time today and issue is that it running rough. I through maybe i forgot to plug one of the coil parks in but they were all pulled in. I put my hand on the exhaust manfold and the passager side was way hotter than the driver side. Is possable all the coil packs are bad on the driver side or do i have short in the wire harness some where. I'm plan on swaping the coil pack out tomorrow to see if that solves it. I check the pcm for codes and none so far. I also checked all the grounds and they are all hooked up. any other ideas to check.
Thanks guys.

bump bump