i have a Acura integra standard Ls 91 stock b18 motor, and when i was driving the car uphill and suddenly it lost a lot of power, there was a bit of oil in the spark plug chambers, it has a radical idle and the car sounds really rugged, ive already tightened the fast idle it helped but its still idling / sounds awful any tips ?

those eat up head gaskets, do this test first https://www.youtube.com/watch?v=QA7KVQq9vKA