I have a 95 neon with 107000 miles on it. When I start the car in the morning the engine knocks for about 10 to 15 minutes. After that the car is fine. Sometimes when its idling the engine will knock for a couple seconds than stop than do it again for a couple seconds and stop. I tried putting Lucas Engine Treatment in it and it did quiet it down a little bit. Any suggestions what I should try? How do you check the oil pressure or oil pump?