i've got a 90civic w/ls swap. it's been in for 2 yrs now and all of a sudden it started to stumble when i hit higher rpms.i have to change gears quikly and get into 5th. as long as i don't go above 60mph it drives fine.i can down shift to go up hill as long as i don't go into high rpms. i've changed the cap/plugs/wires. i've even put on another dist.
when i first changed the c/p/w it worked fine for about 5miles and did it again.i put on the other dist it worked for about 20miles and didi it again. i can drive around aslong as i stay below a certine rpm.i have no tach,so i don't know what rpm.any thoughts?

fuel problem maybe?or maybe bad ecu? any CEL?

the crank angle code came up. funny thing is everytime i turn off the car it goes away.tues when i came home from work it didn't happen at all (60 mile trip one way)until i hit a big water pudle.i'm going to change my fuel filter tomarrow.tks for the response