Hi, I posted this in another thread but I am repeating it here because it may be of interest to others who have had the same problem.
I changed my M.A.P. sensor in my 2010 Fit Sport in hopes it would help with my gas mileage but it didn't. What it appears to help with is the two to three-second crank time that it takes to start my car, before the car is warmed up for the day. With the new sensor, my crank starting time is reduced to about one second. Just F.Y.I. :-)