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Old 05-23-2012, 07:15 PM   #1
02 Dawg
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2002 VUE 3.0L
1999 SL2
Default Revs In Park!

When I put my 02 3.0 Vue from drive into park the engine starts to rev up to 1800 rpms. But if I turn on the A/C it comes back down to normal 850 rpms.
Any ideas what might be causing this?
Thanks for any help.

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Old 05-23-2012, 10:51 PM   #2
tiger862
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2006 VUE 2.2L
Default Re: Revs In Park!

Possible vacuum leak?

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Old 05-23-2012, 11:14 PM   #3
02 Dawg
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2002 VUE 3.0L
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Default Re: Revs In Park!

Quote:
Originally Posted by tiger862 View Post
Possible vacuum leak?
How do I check for a leak? I guess what I should say is where do I start?

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Old 05-24-2012, 11:36 AM   #4
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2005 VUE 3.5L
2007 VUE 3.5L
Default Re: Revs In Park!

Quote:
Originally Posted by 02 Dawg View Post
When I put my 02 3.0 Vue from drive into park the engine starts to rev up to 1800 rpms. But if I turn on the A/C it comes back down to normal 850 rpms.
Any ideas what might be causing this?
Thanks for any help.
You could try Idle-Learn procedures (service manual extract in thumbnail below).

The ECM is in charge of maintaining a specific RPM (+/- ... say, 50 RPM). It generally does a decent job of doing so regardless of engine operating condition or electrical / mechanical load.

Your case is unusual because it sounds like ECM maintains correct RPM with a load but has no data stored for operating with no-load.

It could be a waste of time but won't cost you anything and we can then move on to other ideas.
Attached Images
File Type: jpg 3.0 Idle Learn.jpg (182.2 KB, 10 views)

...
I try to visit forum often but suggest you use private messages if in a rush (comes to cell) and include email address for extracts. I seldom check visitor messages so please don't use.

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Old 05-24-2012, 07:29 PM   #5
02 Dawg
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2002 VUE 3.0L
1999 SL2
Default Re: Revs In Park!

Quote:
Originally Posted by far2grumpy View Post
You could try Idle-Learn procedures (service manual extract in thumbnail below).

The ECM is in charge of maintaining a specific RPM (+/- ... say, 50 RPM). It generally does a decent job of doing so regardless of engine operating condition or electrical / mechanical load.

Your case is unusual because it sounds like ECM maintains correct RPM with a load but has no data stored for operating with no-load.

It could be a waste of time but won't cost you anything and we can then move on to other ideas.
That sounds simple enough. I will try it and let you know what happens.
Thank you,

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