Car Unstable Under Full Throttle

[StlRomAniaN]

Originally Posted by JusticePete

- Worn LCA bushing OEM?

- Worn coilover/shock OEM?

Bushing is OEM. I doubt it's this.

The coilovers on the car are Pedders Xa coilovers. I purchased them back in 2012. Lots of preload on them; pretty firm. Would I need to take them off the car to check them?

Oh, I also have JPSS sway bars with OEM endlinks. Not sure if that would contribute to any of the issues.

[JusticePete]

Originally Posted by StlRomAniaN

Bushing is OEM. I doubt it's this.

The coilovers on the car are Pedders Xa coilovers. I purchased them back in 2012. Lots of preload on them; pretty firm. Would I need to take them off the car to check them?

Oh, I also have JPSS sway bars with OEM endlinks. Not sure if that would contribute to any of the issues.

Start with the clevis on the coilover and make sure the lock rings are tight down to the clevis.

[StlRomAniaN]

Originally Posted by JusticePete

Star with the clevis on the coilover and make sure the lock rings are tight down to the clevis.

Okay, I always check them when my wheels are off, which is pretty often and I've never noticed them being loose, but I'll double check.

Does it sound like my caliper(s) needs to be rebuilt?

[JusticePete]

How many street miles?
How many track miles?

[StlRomAniaN]

Originally Posted by JusticePete

How many street miles?
How many track miles?

85,000 miles of aggressive street driving. Lots of high-speed stopping at the end of drag strips as well, etc. Not too many track miles.

My main "evidence" of this whole issue is the higher resistance of spinning on my passenger front wheel vs my driver front wheel.

Would it be possible that my ABS is acting strange and engaging here and there while driving causing a shimmy?

[JusticePete]

Originally Posted by StlRomAniaN

85,000 miles of aggressive street driving. Lots of high-speed stopping at the end of drag strips as well, etc. Not too many track miles.

My main "evidence" of this whole issue is the higher resistance of spinning on my passenger front wheel vs my driver front wheel.

Would it be possible that my ABS is acting strange and engaging here and there while driving causing a shimmy?

Possibly.

Have you replaced rotors?

[StlRomAniaN]

I replaced my front rotors about 3+, maybe 4, years ago. I believe I had the same issue on my OEM rotors from the factory (inside passenger disc & pad were down to metal; driver side was worn, but not to that extent).

The front rotors I have on currently have been fine since I replaced them (let's say 2013). This whole shimmying/shaking issue begun in November/December of 2016.

Thoughts?

[StlRomAniaN]

I forgot to mention in my initial post today that all of the vibration can be felt through the pedals as well.

[JusticePete]

We'll keep digging and figure it out.

[StlRomAniaN]

Guys & gals,

I think I found the issue. The passenger front tie rod has play in it. I believe the suspect has been caught...


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[StlRomAniaN]

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[StlRomAniaN]

Here's a short video of the passenger front tie rod. Driver side is solid (not in the video).

https://youtu.be/eiWOWjGwCRI

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[JusticePete]

I thought we checked for damaged, broken and worn parts some time ago?

[StlRomAniaN]

In the rear only because that's where I thought it was coming from. My mistake. I'm purchasing the tie rod today and installing it next week.

My question is do I need to replace both the inner and outer tie rod. They're obviously sold separately. The noise is coming towards the inner portion of the tie rod.


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