i did what every one told me to do. i took of the IACV and cleaned the shite out of it. put new O rings on put it back and my engine is still reving up and down from a cold start. seems like alot of people have this problem but never really fix it. some people told me to bleed the IACV but how do you do that? HAS ANYONE ACTUALLY FIXED THIS ON THEIR CAR BEFORE AND HOW DID YOU DO IT(step by step info would be nice)? thats all i want to know. i searched but it all comes up with half assed answers. thanx