i have a problem with my 93 accord 4drs auto...for some reason....my max speed is 83mph and the max rpm goes to is 4500....it seem to pick up normally however when entering onto the highway...it is very weak...the car use to be lowered...after i raised back up...the problem started...i doesn't seem to swith gear smoothly...feel like something is restricting the power of the engine....i really need some advices....