Hi, during damp weather conditions the '87 260E loses power. It starts and runs fine until the engine begins to warm up a bit. Then it loses power. I step on the gas pedal and no response. If I'm not careful it will kill. This past winter it would happen sometimes, and I thought it was cold weather related. But now that it has warmed up, whenever it get rainy and damp, I have this problem. Any thoughts? Thanks..