Re: HELP: 93 Toyota Corolla vibration problem!

NEW SYMPTOMS:

I had the tires changed out for brand new Yokoham Avid TRZ.  they were
under warranty so it didn't cost me anything.  However, the vibration
still persisted.  The new additional symptoms are as follows:

1. when the vibration occurs, you can get out of the car and feel the
temperature of the steel wheels.  The Passenger Front wheel is hot to
the touch and will burn you.  the rest are cool to the touch.

2. the brake pedal has less travel and feels stiffer.

3. more gas pedal effort and reduced gas mileage during periods of
vibration.

4. this problem will start randomly and is not dependent on if you are
using the brakes.  I was on the highway at 1AM and didn't use the
brakes for 30 miles and it still started.

Now here is what I think, although i'm not a mechanic... I think it
has something to do with the front passenger-side caliper.  It may be
locking up somehow.  But i noticed on local roads before the vibration
starts, if the pedal is stiff, pump it a few times and it goes away...
ie the brakes unlock.  The weird thing is I put brand new calipers in
there 3k miles ago.... could one be defective?

Any help or insight would be appreciated.  Thanks.

-Jon