I didn't pull the crank, cam, or ignition module connectors during the LIM/UIM job. Only thing I disconnected where the usual injectors, TPS, MAF, ECT, MAP, Alternator, and IAC. Plus a few vaccuum lines.
Looks like I got a plan of attack.
#1 Clean all grounds and the ground bus.
#2 Pull and clean all connectors I've previously touched. So injectors, TPS, MAF, ECT, MAP, Alternator, and the IAC.
#3 Pull and clean the crank and cam sensor connectors.
#4 Pull and clean the ignition module connection and dedicated grounds if it has any.
#5 Pull and clean the PCM connection.
#6 Clean the battery cables yet again.
I may just replace the CPS anyways for piece of mind.