engine vibration when at a constant speed - JeepForum.com

 
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post #1 of 10 Old 01-27-2013, 04:44 PM Thread Starter
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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post #2 of 10 Old 01-29-2013, 10:07 AM
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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post #3 of 10 Old 01-29-2013, 02:55 PM Thread Starter
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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post #4 of 10 Old 01-29-2013, 02:59 PM
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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post #5 of 10 Old 01-29-2013, 02:59 PM
Evildriver-3
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Sounds motor related, maybe a vacuum leak or something

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Less than 8 is like playing with half a deck
]=Supershafts=[
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post #6 of 10 Old 01-30-2013, 10:19 AM
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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post #7 of 10 Old 01-31-2013, 03:32 PM
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 ??

1995 Jeep gc ltd, 2005 Jeep gc ltd , 71 Dart, 73 RR 440-6pk, 78 Mag GT, 85 Power Ram W-350, 92 Daytona, 99 Dakota, 08 Ram 2500

Less than 8 is like playing with half a deck
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post #8 of 10 Old 02-03-2013, 10:10 AM
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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post #9 of 10 Old 02-04-2013, 04:37 PM Thread Starter
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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post #10 of 10 Old 02-04-2013, 05:43 PM
Sycoglitch
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Happy you found the issue

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