A man came into the store the other day and said that he had a 88 Cougar 5.0. He said that he thinks he needs a new oil sending unit, and if he could install it in the parking lot. Intrigued I followed him outside. He said that when he turns his car on, but does not start it the oil pressure gauge (I know, it is not a real oil pressure gauge but a "dummy" one) will go up all the way. But when he starts the car it will go up all the way and then decend down to red area. This is happening now even after the new unit was installed. What is wrong with this guys car? Is it an electrical problem or what? I told him to call in a few days to see if I can find anything out.