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  #1  
Old 04-01-2010, 01:50 PM
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RPMs drop when stopping

Hey everyone,
Has anyone ever experienced the RPMs dropping very very low when coming to a stop? They kick back up but then the car jerks a little. Almost like the engine is about to stall.

Thanks,
MJ
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  #2  
Old 04-01-2010, 01:52 PM
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Yes, but I don't remember what I paid for to have it fixed.
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Old 04-01-2010, 01:54 PM
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Did they tell you what it was?
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Old 04-01-2010, 02:26 PM
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I have the same thing, but it only seems to happen when decelerating slowly, almost coasting up to a stoplight. It feels like the trans is holding onto the gear a little too long before releasing, thus lugging the engine a hair below the normal idle RPM. Mine won't do it if I have it in Sport mode. No other problems, so I assume its just some manifestation of a glitch in the trans shifting software.

At first I worried about it, but now I just don't care about it. It does it every now and then, it has done it since I got the X, and 10,000 miles later it is still the same. I reached a point where I decided that I was just going to enjoy the ride. Cars will break whether you worry or don't worry.
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Old 04-01-2010, 02:28 PM
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Maybe a vacuum leak?
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Old 04-01-2010, 02:58 PM
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Quote:
Originally Posted by blktoptrvl View Post
Maybe a vacuum leak?
+1
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  #7  
Old 04-01-2010, 04:56 PM
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I have noticed this as well on an intermittent basis on my 2001 4.4i. I'd like to know what it is though.
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Old 04-01-2010, 05:06 PM
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Could this be related to the transmission lurch (lagging downshift from 2 to 1) issue?

Man! so many trans issues right now.
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Old 04-01-2010, 06:14 PM
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I've had this problem on other cars that turns out to be the idle control valve. Not sure if this may be the case with the X. Is it petrol ?
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  #10  
Old 04-05-2010, 01:15 PM
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Yes 4.6is. Premium gas only. I just put an air intake on it and that's when I started to first noticed it. I'll prob try putting the stop box back in and see if it continues.
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