Ok this has got me puzzled and worried. My 88 dx hatch was running rough today and when I popped the hood to see what was going on I noticed that there was smoke coming from the exhaust pipes. Took a look under the car and it seemed that all the piping was smoking and you could litteraly see the heat radiating off all the pipes. Also it has a new valve cover gasket and there doesn't seem to be any new leaks. Any ideas would be helpful. Thanks in advance.