Bad inner axle joints.
SOURCE: Car shakes really when I accelerate from any speed
i would check your motor mounts and transmission mount. sounds like one if them is going bad
SOURCE: My 03 Wrangler shakes only at 45 mph
My Death Wobble started immediately after I installed a set of Coil Spring Spacers (to lift 1.75 inches). Turned out, the DW was because while changing the height, I also lowered the CASTER angle in the front end. So, to fix it, I could have purchased a set of eccentric bolts for $50+. Instead I went out and purchased a piece of 1.5 inch flat bar for $10 from OSH. I cut out 4 1.5 inch squares. Then i drilled 7/16 inch holes centerline, but close to one side (in exactly the same place) on all for squares. I then removed the lower control arm bolts, nuts and washers. I installed these square offset washers I made so the front axle would be pushed forward (to increase the Caster angle). The toe setting changed a bit, so I reset them to about 1/8 inch toe in. After driving my Jeep, I noticed there is no more DW. The steering wheel was off center, but after 3 attempts, I have that perfectly centered. I have every intension of having the alignment checked, but not till after I find the new tires I want. If anyone is interested, I can draw out and photograph the cure and send it to you. My e-mail is bb62471(at)yahoo(dot)com.
SOURCE: i have a 2001 buick regal when i'm driving the car
Drive shaft universal joint worn.Or bearing worn.Have them checked out Before driving any distance.Hope that was help full
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"
SOURCE: 1990 buick regal limited 3.1L V6 rough running/no power
sounds to me like your missing on a cylinder or two, the coil pack is on the front of the motor just below the head, i would trace the wires and make sure they connections are all good, then check the firing order and make sure they are correct, once thats done the next step would be to have the coilpack tested (this can be done at most parts stores) the only other thing it could be spark wise is a crank or cam sensor(in most cases the crank sensor controls spark up to about 4 or 500 rpms once the motor fires the ecm takes over) once all thats done and everything is fine then the issue is fuel delivery not spark at that point it could be anything from a faulty pump relay to a MAF sensor, faulty injectors, bad fuel filter, etc... hope this helps, good luck!
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