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Cruise Control

Old Mar 29, 2010 | 10:01 PM
  #1  
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Hey guys-

My wife's 2000 Disco is about to go into the garage for some EXTENSIVE work to the front end. It's vibrating at 65mph+, but more importantly, the steering wheel jerks around like a bastard when you hit bumps. Something's messed up in there, and I'll have it fixed.

BUT ALSO- starting a few days ago, the cruise doesn't hold. You set it, and it slowly drops in speed (but a lot less slowly than if you don't use the cruise).

Back in the olden days, I know cruise controls worked by pressure- a vacuum hose. I assumed they were all computerized nowdays, but this really seems like a pin-hole in a vacuum hose.

Is that the deal? If so, anyone know about where that vacuum hose is so I can have my guys replace it?

THANKS!

Pat
 
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Old Mar 29, 2010 | 10:28 PM
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Most all Land Rovers use a vacuum system to control the throttle plate, so you are on the right track, especially with the symptoms you described.

For a DII, your cruise control hose is located on the passenger side behind the battery. The hose is short (1' or so) and can usually be repaired by clipping the hose end. If that doesnt work you might have to replace the whole thing. You'll probably see cracks in it if thats the case.

If that doesnt do the trick, it might be something more than the vacuum hose.
 
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Old Mar 30, 2010 | 07:56 AM
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why is this extensive work? sounds quite simple. could be a vacuum leak on the CC. as for the vibration could be the drive shaft, hub, tyres, alignment, tie rod end.... fix both for $500 in parts.
 
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Old Mar 30, 2010 | 08:11 AM
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Thanks guys!

Hill- It's extensive, only in that I have no idea what the problem is, other than it wasn't lessened after a front and rear alignment, and "everything seems tight under there" (by a front end specialist).

But DANG- I never thought of the drive shaft! I wonder if that could be the problem...?

I've been meaning to order a new one for each Disco, maybe I'll start there.

Thanks very much for the pointer, Hill!! You da man!

Pat
 
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Old Mar 30, 2010 | 08:49 AM
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Have you checked your steering stabilizer? If it is dead, you will feel more through the steering wheel.

On your cruise, there is a diaphragm looking thing with a hose attached to it. It should run to a tee fitting, then one to the cruise pump and the other to your beake pedal. Replace all the hose.
 
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Old Mar 30, 2010 | 09:05 AM
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Thanks for the info on the Cruise, OK!

I'll check the stabilizer too- that's the horizontal shock absorber that goes from the steering rod to the frame, right?
 
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Old Mar 30, 2010 | 09:11 AM
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Yup, that's it.

Have you re-built your front driveshaft? If not, DO IT NOW! The vibration is a sign. It is getting mad at you and will slap the tranny out if you aggrivate it much more.

While you have it in the garage with the front tires off the ground, shake and tug on them to see if there is any play. The stabiliser will make the wheel move over bumps, but has nothing to do with vibration. If it is the shaft, you are getting really close to a bad thing.

Oh, and I will add that an OME stabiliser is among the best out there. I got one for mine and the factory wasn't that bad yet. Loads better now...
 
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Old Mar 30, 2010 | 09:22 AM
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Daaaaamn, that sucks. I'll bet it is the shaft! Ordering one now... My wife's got to drive it to class for the next few days- hopefully it doesn't break before then.

Atlantic British, is that the best place to order one?
 
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Old Mar 30, 2010 | 09:55 AM
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I had similiar symptoms and front end play... I ended up needing to tighten my steering gear box down just a bit to take out some of the play... (clearly, don't overtighten...)

That's about a 20 minute job, including putting the tools away...
 
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Old Mar 30, 2010 | 09:56 AM
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Roger that Blu, I'll check it out!

By the way, I'm DROOLING over your Series II. When I was in Colorado, I saw the first one that I've ever seen in real life. My God, what a champion of a vehicle!
 
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