WOW Peter....what a lot of insight! Here is the big stumper about the whole problem. The problem is not consistent at any time. The only thing I can count on is that when I start my car in them morning (I have to back out of my driveway onto the street) she runs perfect. I wind through my subdivision slowing and speeding based on the curves and it still performs at it's best. I eventually come to a stop sign where I have to wait for oncoming traffic to cease so I can turn left. This turn is when the car will hesitate, make the clanking noinse, and spit out a lot of smoke. It seems as soon as the car changes into the next gear after take off, the problem goes away and I get a big boost of energy (the turbo I guess) and she runs great again.....until I hit the next area where I have to either slow up greatly or come to a complete stop. When I apply the initial pressure to the accelerator the car still doesn't jump on command and the smoke billows. I also would like to find out how much smoke is supposed to come from these cars. When I acquired it a few years ago it didn't seem that I saw smoke from the rear view mirror.....whereas now I am seeing smoke roll behind me from time to time with this issue.

Hope this helps to clarify your question a little.