I had a tune up done one year ago. I asked them to address the problem at the time, and they said their mechanic could not find anything that the car was running good. At that time the car would stall out after coming off of the highway. It would restart and I would have no problem accelerating after that. That was the norm until a few weeks ago, when the car started to sputter and even backfire. When i depressed the gas pedal, it would stall, like it was flooding. To get the car going, I would place in neutral, ( the engine always revs good in neutral), and then I would put it into drive when the revs were up and it would bang into gear and the engine at least would have enough rpm's to keep going and not stall.
I have the car in the shop as I have said, and this is Sunday. I will call the shop Monday morning and ask the mechanic for the information that you have posted. Thank you