had JUST had tune-up done--next day, #'s 1 & 4 ignition coils go bad

lol.. Sorry about the spelling I am trying to use my cell phone. To answer your question I checked the fuel pump and it seemed fine, but after reading some blogs on this subject I decided to look into it a bit more.. I pulled the fuel pump check for anything that may be wrong (trash), also check flow and pressure all good. . So I Started over and it would run for awhile then it would stop running.. I tryed spraying some starting fluid and it would start for just a second. so now I'm thing fuel pump again. I replaced the pump with a new one pump. Same result. Sometimes it will run for 1 min and then sometimes it will run for 30 min. Its like something is heating up or braking down and stopping the fuel flow. I know there is probably hundreds of things that control fuel flow but this all started with a tune up! my Car was running a bit rough so we had the plugs changed. Ran like a new car... then the codes (misfire #1 and 4 cylinder) and then it stoped all together. Machanic said we may have had the wrong plugs so we replaced them again. It ran like a new car again and then one day later it is dead again. this is crazy....Sorry about the crazy post ..... any ideas is greatly appreciated