Hello, I have a '98 Honda Civic LX, automatic transmission and I've been having some issues, recently I replaced my crankshaft position sensor, air filter, oil filter, and my idle air control sensor, battery, sanded grounds and i also topped off my transmission fluid. My car will randomly stall at stop signs and red lights and it has also been going to about 4,000-5,000 rpms to shift into any gear, and when down shifting it shifts kind of hard, I can't seem to figure out the problem and I am quite stumped . If anyone has any ideas or solutions, please feel free to share them! Thank You!