flashing check engine light

TLDR: I experienced a flashing CEL while accelerating this morning. This happened twice during the initial part (less than 4 miles) of my morning commute. It only occurred as RPMs went over 3,000. The Jeep felt as if starving for fuel but did not choke out. Weather was low 60s and heavy, dense...

Hey all a while back my check engine light would come on in my 1999 4.0l tj, and it read a random misfire and a misfire in cylinders 3 and 4. Took it to my dad's mechanic and they cleaned the injectors, spark plugs and distributor as well as crankshaft sensor had been replaced recently...