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Gulping noise at start-up?

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Old 07-22-2010, 12:11 PM   #1
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Question Gulping noise at start-up?

I have a 2010 2.7L Access. In the mornings when it is a little cool out I crank the engine and it goes into fast idle. After a few seconds I hear this weird gulping noise (kinda like a big shutter closing) and the engine idles down some. What the heck is that? This is the first vehicle that I have ever owned that made that noise.
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Old 07-22-2010, 12:20 PM   #2
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Mine does it too and it seems to be something with emissions. Most responses to this are in the form of(another vehicle forum):

"Yes, part of the noise is the air pump (which replaced the pre-cat in the uppipe in MY06 and up), and also the ECU is programmed to run the engine extra hot at start-up to minimize the time it takes to reach operating temps in cats, thereby reducing emissions."

As always if concerned go to the dealer! I say save your time and just ignore it. Welcome to the world of "everything on my car is electronic."
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Old 07-23-2010, 05:53 AM   #3
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Thanks. Guess the days of tinkering with these things is completely over. You have a problem, call a computer programmer. Figures it has something to do with emissions. Can't wait for the new E15 gasoline they are trying to cram down our throats. I understand that could cause serious problems.
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