Surging ... one cure
 

Two bad things happened at once with my 380SE. First, it started surging, especially at idle. Then, the booster vacuum hose broke. Well guess what cleared up when I replaced the hose today. That's right, the surging. Engine runs nice and even now ... and I can stop on a dime. For those of you having the surging problem, you might want to check the booster hose. It could be the answer for some of you.

Great tip!;)