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To those who claimed the upgraded anti-roll bar would fix the problem.

The problem, as described by the OP:

.... at high speeds on the freeway, I almost feel like a slight movement of the wheel, a gust of wind, could make me totally lose control of the car (and it's not speeds of 100+, maybe around 70-80). It's my wife's car and she says it seems to shake a lot on the freeway.

The only recent cars we can compare to is my wife's previous VW Beetle,....
How does the upgraded bar fix the problem of "a gust of wind, could make me totally lose control of the car"?

Also, are you telling me that the Honda Accord, with the stock anti-roll bar, is less stable than the Beetle?

OP, if you upgrade the anti-roll bar, don't tell your wife. And let her say whether the problem of "it seems to shake a lot on the freeway" is fixed.

I'm not saying the anti-roll bar is not a worthy upgrade (I myself upgraded mine to the Progress). I'm saying that something else is at work here.
 

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Thanks for the help all.

To be clear, I doubt this is some defect with just my Accord. If I tried another I'd probably feel the same thing. It's just something we haven't gotten used to yet compared to our other cars. Like I said there's probably a million factors like weight and shape of the cars.

But I'll probably try out a RSB and let you all know what I think. Even though my wife keeps saying, "Save your money! It's not worth it! It's not that bad!"

Also, are you telling me that the Honda Accord, with the stock anti-roll bar, is less stable than the Beetle?
An objective answer to that question would take a lot of testing and research. But I can tell you subjectively, 2 people (my wife and I) definitely think the stock Accord FEELS less stable than the Beetle on the freeway. But looking at the two cars, isn't that what you would expect? The Beetle is low and shaped like a bump on the road. Like I said there's a whole lot of factors that would make one car feel more "stable" than another. I just wanted to know what could make my car feel a little more "stable".

There's been a lot of great ideas in this thread. Thanks all.

Aero of course:

Once I attached my middle undertrays I noticed the car felt more planted above 50mph. I started with the engine and made my way back.

Before:
View attachment 369594
After:
View attachment 369586
Before:
View attachment 369610
After:
View attachment 369602

Okay maybe there are some other things to try first... :wink

I had some highway instability in my car that was caused by worn tires in the front and new tires in the back, try rotating them and see if this changes. Get the tires balanced and the alignment checked. Shaking soulds like a balance issue. Toe out on either front or rear wheels can cause the car to feel less stable.
ooh Nice! To be honest I bet that would help a lot. I have a feeling my "issue" has a lot to do with aerodynamics. But a little out of my price range and mod range. haha
 

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To those who claimed the upgraded anti-roll bar would fix the problem.

The problem, as described by the OP:

(Edited out the OP)

How does the upgraded bar fix the problem of "a gust of wind, could make me totally lose control of the car"?
Let me qualify my comments, as if a gust of wind makes you feel like you will lose control of the car, yes, the sway bar upgrade will not fix that. @hdtouring is correct.

But, if you are experiencing the "loosy goosy" feelings that I was when I first bought the car, the sway bar will clean that up. My '03 felt more stable than the '15 when I first got it.
 

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Discussion Starter · #24 ·
Let me qualify my comments, as if a gust of wind makes you feel like you will lose control of the car, yes, the sway bar upgrade will not fix that. @hdtouring is correct.

But, if you are experiencing the "loosy goosy" feelings that I was when I first bought the car, the sway bar will clean that up. My '03 felt more stable than the '15 when I first got it.
At the risk of running this topic into the ground, can you describe the "loosy goosy" feeling a little more?

I'll try to better describe what it feels like for me. So maybe I was exaggerating when I said a "gust of wind" might make me fly off the road. I'll try to describe it another way. With my previous cars, I felt like I could keep the steering wheel pretty steady on the freeway, moving it just slightly for slight curves, not having to do much "correcting". With this car at higher speeds I feel like I'm constantly moving the steering wheel back and forth to correct, like in the movies when they're pretending to drive and just moving the wheel left, right, left, right.. like I said in my original post, hard to put into words, especially without having driven it on the freeway lately.
 

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ooh Nice! To be honest I bet that would help a lot. I have a feeling my "issue" has a lot to do with aerodynamics. But a little out of my price range and mod range. haha
My undertray is made out of coroplast, plastic cardboard basically. Super easy to work with, easy to cut, waterproof, durable, and heat formable. I got two 4'x8' sheets from a sign store at $23 each, but later found out Home Depot hides theirs in the back at $15 for the same size sheet.

That rear diffuser you see there is a part that came standard on the 7th gen hybrid, it was only $45.

Unlike the pictures suggest, I did not put the undertray on, on a lift. I did it on the ground with the car jacked up or on ramps. All in, im out less than $100.

Honda didn't do a very good job with aerodynamic design underneath the 7th gen, i'm sure they did a better job with the 9th gen, just an option..
 
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Here’s another perspective. Fair warning it is not the most complimentary to Honda. To me, Honda’s suspensions are their weakest link. If your wife is comparing this new Honda to her old VW, the old VW probably did hold the road better. It is NOT that Honda’s are bad, but steering and suspension tuning is one of VW's stronger traits. Your wife may be sensitive to the Accord’s feel and may just be something she must get used to.

I can see how a RSB may help slightly. Depending on the degree this bothers your wife, a RSB is a minor cost in the big picture. My suggestion is to not go too aggressive. The stiffer that bar, the more you connect the movement of the left and right rear wheels when going over bumps. The stiffer the bar, the more it will reduce the car’s “independent rear suspension” feel and make it feel more like a live axle. It won’t feel as good on bumps. Some extra stiffness can be very good. Too much can be bad.
 

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Nice thing about the Progress 22 mm ASB is having a choice of two settings. I am currently running mine on the softer of the two, seems to work nicely on roads with rough pavement in the corners.
 

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Sounds like my old kia (2011 optima sx). No amount of alignments, tire rotation or wheel balance would correct the wandering. The accord otoh drives fairly straight with minimal corrections needed. I'd start with a proper alignment where the angles are not only in spec, but also close to the middle of the tolerance range. As mentioned, could also be a tire issue (tire conicity).
 

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All I know is my '13 drives like its on a string up to 80ish bone stock....at 65 on a good straight road it takes almost no steering input to keep straight.
 

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All I know is my '13 drives like its on a string up to 80ish bone stock....at 65 on a good straight road it takes almost no steering input to keep straight.
Same here with my 2012 Coupe, quite nice on the highway. Lowered just a bit with HFS suspension and still have the Progress RSB on my list just for giggles. If I was the OP and had a new ride with a 1000 miles on it and felt that uncomfortable in the car, I'd be at the dealer in a heartbeat! They want a happy customer so have them check tire pressure, alignment, or anything else that might be an issue at their cost...
 

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Discussion Starter · #31 ·
Going through the forum more, it seems like this topic has been discussed before.

http://www.driveaccord.net/forums/8...port-feels-wobbly-unstable-higher-speeds.html

I think first step for me will be to drive the car on the freeway more (it's my wife's daily driver) so I can get a good feel of what I think the problem is.

Next will probably be playing with the tire pressure and taking it back to the dealer just to make sure everything's up to spec.

Then I'll probably put in the Progress bar on the soft setting.

Will try to give updates when I can.

Thanks all.
 

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My issue is a little hard to put into words, but at high speeds on the freeway, I almost feel like a slight movement of the wheel, a gust of wind, could make me totally lose control of the car (and it's not speeds of 100+, maybe around 70-80). It's my wife's car and she says it seems to shake a lot on the freeway.

Rule out the obvious first. Have the brakes and rotors checked to ensure they're not warped/wearing our unevenly. Once you get that out of the way, look at tires. Good all-season extreme handling tires will make a world of difference on how the car handles. After that, you can look at all the nonsense you posted above. Keep in mind that the second you lower that car, it'll be prone to feeling every bump on the road and amplifying it to a degree that she will not like.
 

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My new 2017 Sport, does this on concrete freeways, but not asphalt. I believe it's the tread pattern, this always happens with certain lines of the freeway.
 

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Discussion Starter · #34 ·
Rule out the obvious first. Have the brakes and rotors checked to ensure they're not warped/wearing our unevenly. Once you get that out of the way, look at tires. Good all-season extreme handling tires will make a world of difference on how the car handles. After that, you can look at all the nonsense you posted above.
On a new car? I'll stick with the nonsense above.

My new 2017 Sport, does this on concrete freeways, but not asphalt. I believe it's the tread pattern, this always happens with certain lines of the freeway.
In the thread I posted above, others are also saying a better rear sway bar made the car feel more "grounded". I'm gonna try it out eventually.
 

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In the thread I posted above, others are also saying a better rear sway bar made the car feel more "grounded". I'm gonna try it out eventually.
I had this problem several years but not on a Honda, it was a Toyota. It wandered all over the road and on a windy day it would sometimes change lanes without moving the steering wheel. Almost everyone else on the web site with the same exact car said things like "mine is perfect, never need to make steering corrections" etc.

Not to bore you with details but I had it aligned several times, put on a new set of tires, and tried different tire pressures. I was ready to sell the car when I got a PM from a mechanic at one of the dealers on the other coast. He told me he had seen this problem and it was caused by to little toe in the rear wheels. In other words the front of the rear wheels needed to be pointed toward each other a little more to create some resistance which would keep it from moving around. The interesting thing was just a few of the cars like mine had the problem and it occurred even when the alignment was well within specification as mine was. This model did not have adjustments for rear toe-in so I made some shims and put a bit more rear toe in and it tracked fine. Problem solved.

This is probably not what your problem is but yours could be some equally obscure alignment issue. If what you are already trying doesn't work I would suggest visiting some alignment specialists and see if any of them have an idea.
 

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Discussion Starter · #36 ·
Thanks desertrat. Wow, that's some movement. Did you buy the car new (just to rule out a previous owner's accident)? I think my issue might be more on the level of annoyance than safety hazard right now, like it seems yours may have been.

Just to add another description to our obscure issue, my wife says when she drove on the freeway with the Beetle, it felt like she was going slower than she really was. At the same speed the Accord FEELS like it's going faster.
 

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Thanks desertrat. Wow, that's some movement. Did you buy the car new (just to rule out a previous owner's accident)? I think my issue might be more on the level of annoyance than safety hazard right now, like it seems yours may have been.

Just to add another description to our obscure issue, my wife says when she drove on the freeway with the Beetle, it felt like she was going slower than she really was. At the same speed the Accord FEELS like it's going faster.
Yes I bought it new, the car was never in an accident or anything like that. That model had an I beam across the rear with the back wheels attached to either end. Looking back on it I think that I beam was part of the problem somehow. Toyota didn't help at all. The instability didn't show up until you were at highway speeds and the dealer refused to test it on the highway, they said it was too far away, about 5 miles. I don't buy Toyotas any more and that particular dealer has gone out of business. I would never have found it if the mechanic from the web site hadn't contacted me.
 

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I'd also check tire pressure, but 2-3 psi over the
recommended pressure probably won't make a
difference.
Uhhh,yes it might. There's a reason for the cold pressure values listed on that door placard.

1psi over, like I do to account for possible tire gauge error, won't matter.

I don't know why people can't follow a simple sticker.
 

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My undertray is made out of coroplast, plastic cardboard basically. Super easy to work with, easy to cut, waterproof, durable, and heat formable. I got two 4'x8' sheets from a sign store at $23 each, but later found out Home Depot hides theirs in the back at $15 for the same size sheet.

That rear diffuser you see there is a part that came standard on the 7th gen hybrid, it was only $45.

Unlike the pictures suggest, I did not put the undertray on, on a lift. I did it on the ground with the car jacked up or on ramps. All in, im out less than $100.

Honda didn't do a very good job with aerodynamic design underneath the 7th gen, i'm sure they did a better job with the 9th gen, just an option..
Wowiezowie, sir. That is good work.

Thank you, so much, for the pics.
 

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When I had the 7th gen Accord I went with Bridgestone tires to replace the original Michelins. The Turanza's had a ton more grip, especially in wet conditions, but they tracked like crap. Going down even the smoothest roads I had to make constant corrections, just to keep the car going straight. I suggest finding tires that are good at "tracking".
 
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