ok, i adjusted my fitv because when i started my car i would be idleing at 3g, so after adjusting it it idled at 1,000. i also replaced my lower radiator hose and changed the coolent. Then about a half a week later i changed my oil with synthetic and an engine treatment (prolong). So after starting up my car again it idled at 1,000 as before, but then when i pushed down on the gas pedle my rpms would drop almost to a stall and then jump back up again. Then i did it again and the same thing happened. So i thought maybe it would go away or something. But no it hasnt. Do you guys have any idea what this might be?