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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Bad vibration

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Old Feb 10, 2013 | 03:16 PM
  #1  
nintey4f150's Avatar
nintey4f150
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Joined: Jul 2007
Posts: 248
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From: south jersey
Bad vibration

Have a 94 f150 with a 351w swap.. Just a couple day ago my truck developed a bad vibration that is worse just above idle then anything else.. I replaced both motor mounts one of which was broken but it did not solve the problem. Changed plugs as well and still have the issue.. The balancer seems ok to me took belt off and there isn't any play in it.. Not sure what else to look for.. It does it in park when I rev it up so I figured that eliminates it being anything to so with the drivetrain
 
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Old Feb 10, 2013 | 03:31 PM
  #2  
Festus Hagen's Avatar
Festus Hagen
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Joined: Mar 2009
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From: Maine (NorCal Native)
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Is it running on all 8 ...
Torque converter/flywheel loose ...

-Enjoy
fh : )_~
 
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Old Feb 10, 2013 | 03:39 PM
  #3  
nintey4f150's Avatar
nintey4f150
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From: south jersey
Yea running on all 8.. It smooths out once I start driving and get the rpms up but it has the vibration at low rpms jus above idle
 
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