violent engine vibration at idle

[adakier]

I have a '95 Bronco and the whole engine vibrates at idle. The vibration gets faster and less intense under power, and then increases as I slow down or brake. It is not a misfire, it almost seems like the engine is out of balance. Has anyone had a harmonic balancer go bad? or any other suggestions would be helpful. Plugs, wires, cap, rotor, o2 sensor, have all been changed, there is no apparent vacuum leaks.

Thanks.

 

[JLasvegas]

check the motor mounts

 

[BLADE262US]

Did you time it as a 5.0 or a 5.8 ? A 95 should be timed like a 5.8 and if it is timed like a 5.0 it will run but shake as you describe . /emoticons/[email protected] 2x" width="20" height="20" />

 

[crazyhorse85]

BLADE262US is correct on the timing...but also have you checked the rubber insulator on your balancer...they do have a tendancey to dry rot and let the counterweight slide forward or backwards throwing everything off....on that note it could also be a warpped or maybe lose flywheel...i know i'm just full of good thoughts...but there are quite few things it could be....hope this helps or atleast gives you a starting point.... B)