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Unread 01-27-2013, 05:44 PM   #1
mhaddox
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engine vibration when at a constant speed

I have a 2009 Jeep wrangler. I've had it 10 months, in the last few weeks i noticed a slight engine vibration, which has gotten worse over the past few weeks. It vibrates whenever i am going at a constant speed, regardless of the speed, 10 mph, 30 mph or over 60. it does not vibrate when accelerating, or when my foot is off the gas. I am going to go have the tires balanced this week, but it seems like something else??

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Unread 01-29-2013, 11:07 AM   #2
Evildriver-3
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You have a engine vibe at speeds but not when sitting in neutral and changing the rpm ? Try and explain this with more detail
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Unread 01-29-2013, 03:55 PM   #3
mhaddox
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ok. The engine only vibrates when at a constant speed, it happens at around 20mph and faster. it doesnt matter what speed i go, 25, 35, 40, 50, etc... it vibrates just the same no matter what the speed. But it doesnt vibrate when sitting idle, it doesnt vibrate while i accelarate. and it doesnt vibrate when my foot is off the gas. what i am doing now to avoid the vibration is accelarate to the speed limit, then let it slow down alittle then i speed back up, and so on. One friend on mine told me that it was the tires, and another said it was the U joints.
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Unread 01-29-2013, 03:59 PM   #4
Evildriver-3
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Ok what happens if it's in park and you hold it at 1800 or 2100 ?
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Unread 01-29-2013, 03:59 PM   #5
Evildriver-3
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Sounds motor related, maybe a vacuum leak or something
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Unread 01-30-2013, 11:19 AM   #6
WJ-Jray73
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Easy way to eliminate engine vs. drivetain drive down a hill (no turns) when the vibration is going good, slide it into nuetral and kill the engine if its still vibrating you have a drivetrain/tire issue
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Unread 01-31-2013, 04:32 PM   #7
Evildriver-3
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Thats easier than starting it up in the driveway and holding it at 1800 rpm or whatever rpm right in the driveway ??
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Unread 02-03-2013, 11:10 AM   #8
jokerchief462
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Motor mounts, trans mounts, u=joints, driveshaft pout of balance, pinion angle from lift. It could be a ton of things so the suggestion on how to isolate is your starting point.
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Unread 02-04-2013, 05:37 PM   #9
mhaddox
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Took it down to the dealer to get a diagnostic. They determined that the front CV boot was damaged. They also came up with a list of other small things that need to be fixed. They did tell me to go get an alignment and have the tires balanced.

thanks everyone!
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Unread 02-04-2013, 06:43 PM   #10
Sycoglitch
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Happy you found the issue
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