i have a 98 exteem. automatic. it started yesterday morning out of the blue. car turned on just fine, let it idle for a few minutes to warm up but when i went to pull away from the curb my car wouldnt move forward. i pressed the gas all the way to the floor and after about 10-15 seconds my car started to crawl forward, it eventually gained normal speed but took forever to get there. everytime i stopped it would take me another few seconds to start moving forward again. any ideas?????????