I got home from work, and just as I put it in park and turned off the engine, I heard 3 pops. Not real loud, but loud enough to concern me.
next morning I got up for work and truck was shaking and making a shuddering kind of noise. Wouldn't move quickly at all. Whether it is in idle or accelerating or at high speeds, the popping noise and shuddering continue. More so when first taking off. Code reader says misfire, but I changed out the plugs, wires, and coil pack. Had a mechanic confirm that I did it correctly. Had them tested and they all work fine. The idle is fine. The exhaust isn't blowing out any colored smoke, and it is blowing out just as hard as it usually does.. I sprayed cleaner at different points to check for vacuum leaks.. i don't know where to go from here.

 

Welcome to the forum

"Bad Gas", gasoline with too much water in it will cause what you describe

That's about all I got without knowing the year of the Ranger and what engine you have