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

 

Question

Deck27, 2.4L 4 Cylinder, Bay City, MI, January 29, 2014, 11:55
 Rookie

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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  • Answer #1

    January 29, 2014, 13:36
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     Master

    What looks "cracked and brittle"? Have it scanned for codes!

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    Deck27, January 29, 2014, 13:51
     Rookie

    The hose coming from the MAP sensor. And yes and all I got was a emissions malfunction code. I believe it was p0440

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    pushrod, January 29, 2014, 13:59
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     Master

    The most common cause for that code is a gas cap problem. Replace the map hose.

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    Deck27, January 29, 2014, 14:01
     Rookie

    Would the MAP hose cause it to stall only after the car comes off highway or have a low idle?

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    pushrod, January 29, 2014, 14:21
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     Master

    It sure can.

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    Deck27, January 30, 2014, 09:13
     Rookie

    Just fixed the vaccume leak haven't drove it much yet.

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