So ive had this continuous problem with my 99 gt convertible since i bought it over a month ago, first the idle would surge at a stop and try to power through the brakes but now that has become less of an issue, i didnt get much feedback on it through here so im just gonna wait since it seems to have gotten better. The one thing that hasnt changed is when i put the car into drive the rpms drop to around 200 like its gonna die then it lurches forward or reverse ( whichever gear its in) then it drives fine. Any ideas wht it could be? no i havent replaced the iac yet since im not sure thats the issue because ive never experienced a bad iac through these symptoms. Any feedback would be appreciated thanks in advance.