Hi- I have a 93 Ford Tempo 2.3 automatic. I have a few questionsI hope to get answered here. #1- Is an exhaust pipe hard to install? My pipe rotted off at the catalytic converter. Now its making a load noise. #2- When I take my key out of the ignition the engine seems to run for a couple of seconds afterwards. Its a little higher pitched then the regular engine sound. #3-I have a windshield leak that I have no idea where its coming fromAny ideas onhow to find the source? #4- I have a 4 inch hole under my drivers side floorboard. It rusted all the way through. I can reach up through the hole and touch the carpeting. any quick fixes on this without spending a fortune. My tempos body is in great shape and has 110,000 miles on it.