97greencivicex

i have a 97 civic ex d15b 1.5 and it hesitates mainly when im cruising if i punch the gas pedal it hesitates than takes off but also feels like it has a loss of power .but if i push the gas pedal about half way it hesitates and rpm's drop and feels like its gonna shut off unless i push on the gas pedal all the way then it will go. any advice anyone??????????????????????

i did change the coil, i cleaned the air idle valve, i cleaned the throttle body and i put fuel injector cleaner in the gas tank