acting funny at 70 m.p.h.

[DROOPY209]

Alright, heres the problem. This problem started a couple days ago, when I got back from Los Angeles.

Now, whenever I get on the high way above 60 m.p.h. my car starts to shake a little.
The steering wheel shakes, kinda like a vibrating type of thing. It gets kinda annoying.

When I let go of the steering wheel, it goes straight on its own pretty far.

If I hit the throttle and hit 80 m.p.h. the vibrating goes away.

My tires are 225-40-18zr all around.

I have the tire pressure at 40 p.s.i.

It doesn't always do this, sometimes. If I get on a nice freshly paved stretch of highway, it doesn't do it. Below 55 m.p.h it doesn't do it.

What do you guys want me to do next?

p.s. a guy at a tire shop in L.A. said my rear alignment was off, as my rear right tire was kinda pointing in from the top of the tire. Would this cause all that vibration and shaking?

 

[wret]

Wheel bearings, I suspect. Bad alignment will eat your tires without the courtesy of announcing itself with noises and vibrations.

 

[PSIcho]

Could be as simple as your tires are out of balance. Or you may have lost those things they stick to your wheels when they do wheel balancing.

 

[DROOPY209]

as a matter of fact, I took off the right rear tire the other day and noticed that there weren't any weights on the inside of the wheel like they usually do.

Unless that wheel was dead on balanced on its own with no weight on the rim.

That sounds kinda fishy, I think imma hit up a tire shop and get every wheel checked to make sure that they are all balanced.

The rear wheels appear to have some toe-in from what I see.


Would a missing weight on the rim and bad toe-in on the rear wheels give me that vibration above 60 m.p.h. and steering wheel shaking?

 

[PSIcho]

as a matter of fact, I took off the right rear tire the other day and noticed that there weren't any weights on the inside of the wheel like they usually do.

Unless that wheel was dead on balanced on its own with no weight on the rim.

That sounds kinda fishy, I think imma hit up a tire shop and get every wheel checked to make sure that they are all balanced.

The rear wheels appear to have some toe-in from what I see.


Would a missing weight on the rim and bad toe-in on the rear wheels give me that vibration above 60 m.p.h. and steering wheel shaking?

Most definately. Even if its in the rear if its bad enough it'll shake the entire car or maybe that alignment is off in addition to it. I even experience this when my tires wears off , due to uneven wear, it'll start vibrating at highway speed as well as having the steering wheel shake. Once new tires goes on, smooth as silk. You may even try isolating it by rotating that rear wheel to the front, I'm sure that'll make the shaking even worst.

 

[92Talon251]

Alright, heres the problem. This problem started a couple days ago, when I got back from Los Angeles.

Now, whenever I get on the high way above 60 m.p.h. my car starts to shake a little.
The steering wheel shakes, kinda like a vibrating type of thing. It gets kinda annoying.

When I let go of the steering wheel, it goes straight on its own pretty far.

If I hit the throttle and hit 80 m.p.h. the vibrating goes away.

My tires are 225-40-18zr all around.

I have the tire pressure at 40 p.s.i.

It doesn't always do this, sometimes. If I get on a nice freshly paved stretch of highway, it doesn't do it. Below 55 m.p.h it doesn't do it.

What do you guys want me to do next?

p.s. a guy at a tire shop in L.A. said my rear alignment was off, as my rear right tire was kinda pointing in from the top of the tire. Would this cause all that vibration and shaking?

I had the exact same problem as you except mine would happen at 55 to 60 MPH and go away under acceleration. Only one of my tires had a wheel weight on it so I got the tires rotated and balanced. They put some wheel weights on the other 3 tires, havent had any trouble since.