Im having as major issue with my DFP 900 degree thing. In GT4 the accelarator wont respond fully. Sometimes it might be just 5% of the throttle not working other times its like 20-40%!!!! Its about 6 months old and has been well taken car of. Any one had this problem? Ive tried checking all the connections and everythings all good it must be something internal. Ive lost my warranty and instructions so i cant take it back im hoping its a well known issue 