I have a 1990 Toyota Corolla SR-5 5-speed manual with the 1.6 liter engine in it. I was driving home from work tonight and I was on cruise control then all of a sudden when I was climbing a hill in cruise control my RPM's just kept going up and no accelerating at all. So I slowed down and was shifting back up and while shifting when I hit the gas the RPM's jump but nothing was happening. So I pulled over and popped my hood and saw that my exhaust manifold was glowing orange, so I let my car sit for 5 minutes and then went again and same thing happened. I need help ASAP being that this is my daily driver. Thanks