My friend has a 91 Merc. Sable Wagon with the 3.8 and the thing just keeps stalling at red lights and some times in park. Other than that it runs fine (knock on wood) It has a new motor but i don't know how old it is. But today it was doing good it did not even stall, but my friend rase the idle sped a little thought so it runs at a little under 1k. But a question I have for my self is why does the 3.8 engine sound like raaaannnnnnnn.