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rythmic vibration at idle

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Old Nov 6, 2007 | 12:32 AM
  #1  
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pf350
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From: Orangevale, CA
rythmic vibration at idle

Since adding my exhaust to the truck I have noticed a deep dull rythmic vibraton at idle. It is at its worst when first starting the vehicle. Any acceleration and it is gone. Wondering if this had happened to anyone else. Thought about things like harmonic balancer and torque converter but don't want to play the guessing game when it cames to replacing those parts. Thanks
 
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Old Nov 6, 2007 | 05:09 AM
  #2  
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From: Herndon KY
Originally Posted by pf350
Since adding my exhaust to the truck I have noticed a deep dull rythmic vibraton at idle. It is at its worst when first starting the vehicle. Any acceleration and it is gone. Wondering if this had happened to anyone else. Thought about things like harmonic balancer and torque converter but don't want to play the guessing game when it cames to replacing those parts. Thanks
I would venture that it is your exhaust touching the frame or firewall somewhere, I have the opposite problem, when I accelerate hard my exhaust touched the fire wall and I would get the vibration, I found where it was touching, adjusted it with a crow bar and no more vibration.
 
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Old Nov 6, 2007 | 06:38 AM
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I would have to say exhaust as well..If you have the 4" DP look up in from under the truck where the DP go's by where the head and VC meet..its I tight fit in there..some have taken a hammer and make a small dent right in that spot..another spot is the heat shield under the passenger seat...there is 2 long bolts sticking down that some times need to be cut flush with the nut..other then that.. just look the hole system over..let know how you make out...
 
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