The rough, fluctuating, stumbling, hesitation, unstable idling was from the throttle body fuse. Installed a new 10amp mini fuse. Problem gone.
Removed & cleaned the throttle body, installed new iridium NGK spark plugs,
new fuel gas cap, cleaned all fuel injectors, new transmission flush & fill fluid, new transmission filter, new transmission pan gasket, new flush & fill engine oil, new engine oil pan gasket, OEM/factory engine oil filter, new cabin air filter, new engine air filter, new battery, ignition coils/packs still good.
Was still having that rough stumbling fluctuating high & low rpms. I wouldn't go away & eventually went into limp mode. 20mph wasn't fun at all.
Looked at the relays & fuses. Changed/replaced a few burned out fuses. Especially if one crosses the polarities. I burnt out the throttle body/aic air idle control 10amp fuse.