No mods on this engine... that I know of. Just came out of a plug/wire/oil change. Just for giggles & grins I'll have the 'puter reflashed and see what happens.
As widespread as this #4 misfire seems to be on the 3.8 it's surprising no tech bulletins or fixes have been found by now. I do a lot of multiple stop daily driving and if it weren't for the closed loop miss on restarts I guess I could live with this particular gremlin. But just knowing the engine is out of balance for a few minutes and remains an unresolved problem bugs the crap out of me. ~FH