I had a dianostic done on my 1998 dodge intrepid and was told that the idle control valve and the tps was going bad. i had them changed but my car is still having the same problems. it cranks and idles fine ,but when i put it in gear and press the gas it starts to idle high then low and i have to pump the gas to keep it from cuting off. then i was told it could be i need a throttle body cleaning. does this sound like something the right thing to you?