I just got a used 2005 passion cabrio and it was running great no trouble just real dirty. So I watched a video on how to clean your engine and I did and now when I have it in Automatic it wont change gears but I can change gears on my own. Please help how can I fix this and what did I do wrong?????? I took it for a drive and it goes it just wont change gears on its own anymore. Help!