I have repaired the vaccum switch, modulater. But if you let the car sit for a few days, you to keep reving the engine , and eventually it starts moving. After it waems it runs fair. I have been trying to set tyhe pressure, but cannot get anything on the pressure port. I have a 1981 300D with a 722.118 trans. I cahnged the filter and fluid too. What is going on? A pump going out? Thanks for any help.