'88 D90 swaying at "high" speed and gas pedal sticking - Defender Source
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  #1  
Old March 8th, 2016, 12:58 AM
ITALY2AMERICA
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Zachary Hoyt
88 D90 CSW
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'88 D90 swaying at "high" speed and gas pedal sticking

Hey there, just picked up my '88 D90 and I noticed two issues, one that needs addressing and one that may just be part of the defender experience. First, I notice that when I'm driving on a downhill grade at highway speeds, the truck starts swaying in a somewhat harmonic fashion, which pulls the steering left and right enough that it requires constant attention. It's not a jerk, but it seems like the truck just doesnt want to go straight. I should note that mine is on offset 25cm 265 65 16" wheels and is lifted 2", which may be a contributing factor.

The second issue is that after I have been driving at highway speeds, obviously floored the whole time, the accelerator pedal sticks in the fully floored position. Anyone experience a similar problem?

Thanks!
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  #2  
Old March 8th, 2016, 01:13 AM
RBBailey
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RBBailey
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With the swaying, check everything from tire wear and balance, to play in the bearings, to play in the steering rod ball joints, to the steering dampener, to the steering box, to the steering linkage... Chances are it is a ball joint.
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  #3  
Old March 8th, 2016, 06:51 AM
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1of40
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Dude, be careful. Taking a 30 year vehicle you don't much about yet and putting it through the stress tests can be dangerous.

I'd suggest having someone help you check the bushings and alignment and all suspension components. I be willing to guess shocks and bushings are shot and the tires are old and dry rot.

Sticky accelerator could be gummed up dirty cable from years of neglect.
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  #4  
Old March 8th, 2016, 07:10 AM
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Zachary Hoyt
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much appreciated, but the bushings are in good shape, and the shocks and the tires are less than 1 year old.
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Old March 8th, 2016, 07:24 AM
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Wow, all that play on perfectly good bushes, shocks and tires. Could be the chassis is toast or the crossmember was removed.
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Old March 8th, 2016, 07:52 AM
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Bill Adams
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Are the tires properly inflated? That's check #1. Are the wheel lug nuts tight? If the steering is vague, it's possibly the steering box, or the column shaft has some play in it.
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Old March 8th, 2016, 08:39 AM
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Trevor Griffiths
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Tire pressures? Toe-in (or out)? Swivel pin pre-load/bushings/pins? Trailing arm frame bushings? The lift took away some caster, but there is so much else to check....you mention that the "bushings are in good shape", but which bushings? I think there are at least 16 excluding sway bar and individual shock bushings....Based on what parameter are they good?

------ Follow up post added March 8th, 2016 08:44 AM ------

With the engine off, disconnect the throttle cable at the engine, operate the actual throttle by hand and see if it sticks open, then try the pedal and see if the cable sticks. What engine has been installed in your '88 defender 90?
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