My hyundai sonata 1996 model is revving too high. I tried to adjust mixture screw by screwing it all the way in and also tried to fiddle around with throttle positioning switch and yet still revving h
Try loosening your throttle cable, or check if something is holding it. You could also have a vacuum leak somewhere around the throttle body. Or you could just retard the timing.
Search Hyundai Sonata Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Hyundai Sonata Experts