Any vacuum lines I have not located

This truck has a severe low idle shakes very hard. I was informed that misfire cylinder one and four and a af, I have replaced one of the ignition coils two of the towers had no spark, I also replaced the idle air control sensor, cleaned the throttle plate and replaced the throttle sensor, I have also cleaned the MAF, and replaced the DPFE. When I changed out the coil truck ran smoother I sprayed some cleaner around the throttle base and IAC areas to make sure no vacuum leaks and the idle went back to severe shaking. Any ideas would be helpful, I know I will get flack for replacing things but this truck is going to a sixteen year old for a first vehicle so rather make sure he is safe also. By the way this truck has two coils. I have another MAF from a wrecking yard have not tried that yet, but I know some times Ford is notorious for having vacuum lines in less obvious places. Thank you