I have a 88 yj 4.2 auto...for the last few months the damn thing will just die and not restart....I have spark and fuel...after 1/2 hr or 2 hrs she will start back up.....everytime it dies the floor gets hot..I have replaced the ignition contro module and still the same thing all my connections seem good...I was told that the catilyic converter might be plugged...that might point to the heat on the floor just before it dies...before I start replacing the converter...would anyone here please have some insight on this problem...it is gettong real hard on the nerves breaking down in rush hour