Wrong thermostat 195 degrees required to properly burn today's fuel. Below 195 fuel collects in the intake and burns off in the cruise mode...a-f goes lean. Gee whiz Mr Wizard how do you know that?...Inovate AF gage and experience. wrench

OP where is your temp? See below. Are you at 240?

195 degrees is not hot
210 degrees is not hot
195-215 degrees is normal
220 degrees is warm
230 degrees is really warm
240 degrees is hot

Wrong Fan
use the jaguar [short] fan clutch and the stock fan

Coolant 60% h2o and 40% coolant and the additive like water wetter.