My '86 911 has just started a new problem. Some history: The engine has always started on the first 1-2 revs and settled into a smooth idle almost immediately. I had a 60K full service done in Sept.and the car ran flawlessly on a 2400 mi. high speed dash up to Yellowstone and back in early Oct. Two days ago, I noticed the start drill had changed. After the car has sit for 24-36 hrs, it still starts very quickly but seems to be rough and rocking for 5-6 seconds before settling into a smooth idle. The rest of the day all starts seem normal. I suspect pressure to the injectors is bleeding off over time. I've also noticed an increased gas smell around the car in the morning. Is this a known problem? Does anyone on the BB recognize the symptoms? Would appreciate your ideas and/or fixes! Thanks in advance.