I have a 1998 Oldmobile Eighty Eight. It has a 3800 Series II 3.8L V6 engine w/ 80,000 miles. It was running great and it just fouled out. We replaced the plugs because they were a mess and were covered with oil. At the same time, we replaced the battery because it was swollen and old and the starter was replaced too. After doing all of this, the engine ran great for about a minute then it fouled out again going out slowly like it was running out of gas. The new plugs are now evenly covered with oil. There were no noises before the engine stopped either time. No rattling or clacking. We suspect a cracked intake manifold, but would rather find someone who has run into this problem before pulling everything apart.