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The mkiv Supra Owners Club

alignment on acceleration problem


SupraPito

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Now this is interesting because not long after I got mine last year I thought the steering was a little odd - it felt like the car was wandering around the road and would suddenly change direction without warning. My girlfriend noticed it too when she drove it.

 

Getting it out of storage on Sunday I noticed again that it seems to still do it... but I'd never matched it up to accelerating and decelerating. Hmmmm.

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Originally posted by 200SX Boy

Now this is interesting because not long after I got mine last year I thought the steering was a little odd - it felt like the car was wandering around the road and would suddenly change direction without warning. My girlfriend noticed it too when she drove it.

 

Getting it out of storage on Sunday I noticed again that it seems to still do it... but I'd never matched it up to accelerating and decelerating. Hmmmm.

 

When I first drove my Supra I was convinced the alignment was all out. I n fact I insisted that JIC get it checked out. What it was in reality was the fact that I simply wasn't used to driving a car with such great wide wheels at the front. I've never driven a car that tramlines as much as the Supra but TBH I hardly even notice it now.

 

As with 200SX, I never tied it down to accel or decel. It just did it all the time, following every curve and crease in the road, and causing odd and seemingly random changes in direction under braking.

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I have noticed similar issues with slight drifting of the steering, it's predictable as to when it will drift as it happens at the same point on the same roads to work. Good old British roads. As with Darren, It was really noticeable once stepping from my old car to the Sup.

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I had exactly the same problem. My geometry was slightly out. Car is now back to tramlining normally! Actually, getting the geometry sorted even helped improve the tramlining!

 

Also, Chris is right - I always make sure my tyre pressures are right and my tyres matched - even if it means throwing away a good tyre! Don't want any 'mysterious low speed' accidents:sly:

 

Jezza

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Tyre pressures. When my rear right was slowly deflating I could tell how far gone it was by the car pulling to the right under acceleration and going straight again when lifting off. It would do it in 6th with mild acceleration, it was that sensitive. About 4psi difference will start manifesting this, but it has to be at the rear. If the fronts are imbalanced it'll start tramlining more.

 

-Ian

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If it feels like the road wheels are slightly tugging the steering wheel in one direction it's tramlining. Generally, if you sit more towards the middle of the road it will pull right, if you then ease across to the edge of the road you'll feel it suddenly change to pulling left. The more rutted the road the easier it is to notice and it's a *horrible* effect.

 

Tyre pressure settings won't cause tramlining or acceleration yaw per se, it's just a pressure imbalance between the wheels that does it. If you haven't got that, time to look at your suspension alignment etc.

 

-Ian

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well, whether those with similar problems wanted to know this but embarrisingly the problem was actually low tyre pressure on the rear near side, hence the lack of traction on the left side and great traction on the right. so in effect the car was pushing to the left and twisting back to the right.

 

It seems I have a slow puncture which until this thread i ruled out tyre pressure in the "it couldnt be something as simple as that" syndrome.

 

I will keep an eye on the thread as I'd be interested to know if others have other issues.

 

Philip

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