Finally got off my lazy ass and dug the ECU out of the ZJ to clean its connector. Man was it packed with dirt. Took about a half can of cleaner just to flush it out.
The connector was absolutely full of dirt. How I dunno.
One thing for sure it's running smoother now. Still not perfect but there is one more engine connector to clean.
With these silly low current/voltage circuits just a teeny bit of stray resistance is enough to cause all sorts of crap. :/ Sometimes I miss the old Chevy... nah..