Hello again all. I am a super pissed off newbie

. I have a 1992 325is and i have been messing around with this car for a year and two months and i dont know how much more i can take, so the bmw was idling high and i got some info from you guys who are always right so i dont know whats happining now. so it was idling from 500 to a 1 grand and they said to clean the ICV so i did and it made it worst. so i changed the valve and it sounds bad. one of the tubes was cracked so i changed it. the car is going vroom vroom vroom and it shuts off but if you hold the gas pedal its steady, i just dont know what to do anymore. im ready to sell it. if anyone has any answers please help.........