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danny
danny, Mechanic
Category: Car
Satisfied Customers: 5064
Experience:  Mechanic at school corp bus garage! Experience in fleet diesel and regular automotive.
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1994 Ford F-250: turbo..It idels rough (shakes the cab), there..MPG

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Hi, I have a 1994 Ford F-250 with the 7.3L idi factory turbo (vin K). It idels rough (shakes the cab), there is no loss in power and MPG is what I would expect it to be. I have installed a new fuel return line kit that came with O rings.
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danny :

My Answer is based on clues, symptoms and info in your question. Please include everything. Thanks

danny :

Do you get a clunk when shifting to drive or reverse?

danny :

if auto

Customer :

yes when going into reverse

danny :

cam you rock the gas peddle on and off in drive and hear a clunck I am thinking bad motor mount

danny :

you would have to hear it up front. check mounts for loose or broken pads

Customer :

no the engine will just torque up not like a bad motor mount

danny :

rubber bushing on mount

danny :

have you done a visual on mounts yet

Customer :

yes there original but still good

danny :

Is it missing?

Customer :

i dont think so, it holds a rpm fine and it doesnt want to die and the problem only showes it self when ideling (in gear not not)

danny :

you may be idleing to low.

danny :

does it seem the same as before idle rpms?

danny :

If so I believe your harmonic balancer needs reblacing.

Customer :

low idle is aprox 600-650, im not quite clear on "does it seem the same as before idle rpms?"

danny :

has idle gone down? or idle rpms same?

Customer :

no they have allways been the same

danny :

If idle is same then i would go with a fluidampr harmnonic balancer. it will run as smooth as a 6.0

danny :

you notic smoother acceration also

danny :

notice

Customer :

okay how difficult would insatlling that be, im mechanicaly inclined but i dont have maeny specilized tools

danny :

this is a best case senerio as

danny :

I will show you r and r so you can feel it out.

Customer :

okay

danny :

be right there

danny :
  • Disconnect battery ground cables.

  • Remove fan shroud, then the fan and clutch assembly. The fan retaining nut has lefthand threads.

  • Remove drive belts.

  • Raise and support vehicle.

  • Remove crankshaft pulley.

  • Remove damper to crankshaft attaching bolt, then the damper.

  • Reverse procedure to install
  • danny :

    pretty generic i can get better for you by monday morning if you plan to do work your self. Just book mark page and you can view even after accept.

    danny :

    its about a 2 hr job for the shade tree fella

    Customer :

    alright im going to have some of that stuff out when i put the new rad. in, is the damper keyed or is there a special way to put it on

    danny :

    no, bolt

    Customer :

    okay this will be next weekends project, thanks

    danny :

    your very welcome

    I have requested r and r better for you. check monday morning. worse case senerio for you is the crank shaft. or cam being warpped. have faith in your 7.3 though.
    danny and 8 other Car Specialists are ready to help you