Hi, i just bought a 1999 Hyundai with 55,000 miles on it. I drove it for only 150 miles and some things happened. 1 the check engine light came on. Next about 10 min later, no heat would blow out. only cold air would blow. Im in wisconsin and as you could imagine I need heat. Any suggestions? Also fuel gauge does not seem to move fast when you fill it up and never goes to the full mark. Thanks Mark