rough start 2003 jetta
My Jetta runs great during unchanging weather. When the humidity goes up it's very difficult to start, then runs extremely rough, turning on the A/C makes it stall. Starting it when the humidity goes up makes it act as if it is starved for either fuel or air.when it happens . l There is a distinct smell of gas when it happens. I get a MAP sensor code along with several misfires on all 4.
Since you have a MAP code did you replace the MAP sensor? https://en.wikipedia.org/wiki/MAP_sensor
Did you ever figure out the problem? My car is doing the same thing
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