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rofl... I just got my focus about 3 weeks ago w/ 90k
Its done it for the whole 3 weeks. It makes a light hiss noise when I accelerate and when I turn the steering wheel.

It also makes a light whine/humming noise. Are these noises somewhat normal?

Also I think my suspension is going to crap, car shakes up from on the highway going over 65... and when I hit bumps I hear hollow noises..

Any advice for any of this would be helpful.. Thank You
 

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WHEEL BEARINGS - HUMM noise
SHOCK & TIRES - Shaking over 65
Hiss @ accel - Exhaust System - Maybe Power steering system as well - Vacuum Leak

If there is any more info that you can give specifically post it up. It would def Help.
 

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If by "a hollow sound" you mean like a "Boooiiinnngg" comming from the whole body (sort of like you're riding inside a steel drum), I think that's normal. I've had 2 ZX3's now and they both did it. New tires had a big effect on it- lessened the sound in my case.
 

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The hiss on acceleration is most likely the EGR inlet tube. Check the tube that runs off of the exhaust manifold, noting if any soot is present at the flange weld. These are super notorious for going bad, I'm on my 3rd one. Part is around $30, install is easy as pie.
 
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