today i got some new alloys on my car i went from 18 to 19 inch although it may be nothing to do with this on the way home on the motoorway as i slowed down my car was still reving at 2000 revs even when i stopped when i pressed the brake it came back to normal ....when slowed AGAIN at the next lights it done it again does anyone no why is it because ive gone up an inch with alloys ???? NHN HELP ME OUT BUD