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?
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2000 Pontiac Grand Am Question: Mine looks cracked and brittle but It doesn't do it in warm temps.
Answer #1pushrod January 29, 2014, 16:36Master
What looks "cracked and brittle"? Have it scanned for codes!
ReplyDeck27, January 29, 2014, 16:51Rookie
The hose coming from the MAP sensor. And yes and all I got was a emissions malfunction code. I believe it was p0440
Replypushrod, January 29, 2014, 16:59Master
The most common cause for that code is a gas cap problem. Replace the map hose.
ReplyDeck27, January 29, 2014, 17:01Rookie
Would the MAP hose cause it to stall only after the car comes off highway or have a low idle?
Replypushrod, January 29, 2014, 17:21Master
It sure can.
ReplyDeck27, January 30, 2014, 12:13Rookie
Just fixed the vaccume leak haven't drove it much yet.