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Old 08-15-2009, 08:42   #1 (permalink)
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Rough(er) idle?

I've noticed that when stopped at a light (holding the brake) but even when in park there's SLIGHT vibration throughout the vehicle (2004 Navigator), RPMs are steady but you can feel the vibrations a bit and if you focus on something outside the vehicle you can notice that it's vibrating.

Any ideas?
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Old 08-15-2009, 09:07   #2 (permalink)
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Re: Rough(er) idle?

Sounds like an engine miss. Take it to Autozone and see if they can get a code.
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Old 08-15-2009, 10:19   #3 (permalink)
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Re: Rough(er) idle?

Quote:
Originally Posted by rtg143 View Post
Sounds like an engine miss. Take it to Autozone and see if they can get a code.
That wouldn't be too bad (pretty easy fix) but there are no codes at all..is it possible that there's an issue like that without CEL/codes popping up?
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Old 08-15-2009, 11:37   #4 (permalink)
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Re: Rough(er) idle?

That can happen. If it has a miss for quite awhile it will set a code. sometimes there are spark plug boots that let the spark jump to ground causing a miss and no codes will be set for awhile. If you can feel it when it's idling, disonnect one fuel injector connection at a time until you find the one that doesn't change the condition and that's where to look further. Plug, coil pack etc.
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Old 12-13-2009, 19:01   #5 (permalink)
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Re: Rough(er) idle?

I will start by listening at the engine with the hood open. I had the same problem and it happen to be a leak in a big vacuum elbow right under the engine cover. Change it and the problem stopped.
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