2000 Pontiac Grand Am Q&A

2000 Pontiac Grand Am Question: Mine looks cracked and brittle but It doesn't do it in warm temps.

In cold under 10 degree mornings my car runs fine on highway then after I get off the highway the rpms drop and drop too low and sometimes stalls but mainly rough idle. Any ideas? -
Answer 1
What looks "cracked and brittle"? Have it scanned for codes! -
Comment 1
The hose coming from the MAP sensor. And yes and all I got was a emissions malfunction code. I believe it was p0440 -
Comment 2
The most common cause for that code is a gas cap problem. Replace the map hose. -
Comment 3
Would the MAP hose cause it to stall only after the car comes off highway or have a low idle? -
Comment 4
It sure can. -
Comment 5
Just fixed the vaccume leak haven't drove it much yet. -