Jason, it can be a number of things causing the vibration..check the obvious first like Glenn Blevins answer. If that doesn't help then go on to the less obvious things..Like...
Hard starting or getting real bad gas mileage? (I know, the mileage sucks to begin with..I own a 2000 OBS Tahoe Limited so I know the mileage sucks!)
*Fuel pressure regulator..
*Spider fuel injection..Check these to make sure pressure is holding good.
*Distributor..They wear and act crazy...I'm in the process of changing mine now...It made my Hoe shake badly!
I don't know what the mileage is on your Hoe but I would say it's about time to start checking all the things I have mentioned.
There are lots of really good forums to get info on these trucks..OBS (Old Body Style) trucks have a large cult following so you will not be at a loss for info.
The vibration started at about 40 mph and would chill out around 65 mph...I knew it wasn't tires/rims on mine so I hit the forums and found a new world of info and testing to do on mine.
If it turns out to be a worn distributor on yours, go to ebay and purchase an billet aluminum made one..about 5-10 dollars more than the stock plastic shell OEM one that came on the truck.
I think the tires need to be balanced I don't think its the rotors cause your car will shake when you apply the brakes that would indicate bad rotors
Either the tires need to be balanced or the rotors need replacing do the tires first if that don't work do the rotors
SOURCE: Won't go past 40 miles per hour
no not muffler problem could be bad gas or TPS sensor how many miles you have on it?
SOURCE: Won't accelerate past 40 miles per hour
these jeeps did have a small problem with the tp sensor. i would also have the back pressure of the exhaust checked to see if you have a catalytic converter choked up.
SOURCE: my 1997 expedition, shakes really
Take a close look at the tires, look for bulges and lumps. You may have a slipped belt. Where the rubber delaminates from the reinforcment belt embedded in the tire. If this is the case, you must replace the tire. Also look for missing balance weights. Around the rim you should be able to tell if a weight fell off.
Another very serious possibility is a failed shock absorber. A very rough test is to manually push / bounce one corner of truck down a few times then let go and see if it keeps bouncing more than one time, one and half max. Check all 4 corners.
Otherwise, possible bent rim, missing lug nuts, bad wheel bearing.
Good luck
Testimonial: "I switched tires from front to back and wala no shake. I couldnt believe it considering how bad the shake was thanks"
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