Fixed the p0174 and p0171 replaced the bushings and no codes are showing but there is still a miss in the idling. What could it be?

Ma'am, Sorry, the list of things it could be - will be a long list ! We simply need more information to answer a question with so many possibilities, because we perform diagnostic testing; to discover the solution. 1 > Compression test, 2 > ignition system test 3 > fuel supply system test, 4 > fuel delivery system test

replaced what bushings?