I have an 01' Nissan Sentra SE 2.0Lthat was stalling as I put in reverse to back out of driveway for about 2 weeks. It would start right up and be fine. Then it started to stall as I was in drive and then it started stalling as I was actually on the move at 35-40 mph. We replaced the MAP sensor one week ago and it seemed to be fine until today. I drive a paper route for about an hour at low speed and it did fine but upon starting the car back up to run an errand 3 hours later the car did the same thing, stalling on the road. I can start it right back up but acceleration is not there. I have to slowly build up to 35mph and even then the car is acting like it wants to stall.