One rotor much hotter than other 3 - cause of vibrations?

[speedyspaghetti]

Originally Posted by 356Guy

I like the idea of the rolling road test. Also, have you checked the front wheel bearings? My $0.02

I replaced the front wheel bearings about 500 miles ago - did not make much of a difference. Haven't checked the rear bearings with the rotor off, but the wheels do not move at all at both 9&3 and 12&6. Can you explain what you mean by rolling road test?

[911monty]

Originally Posted by speedyspaghetti

I replace the front wheel bearings about 500 miles ago - did not make much of a difference. Haven't checked the rear bearings with the rotor off, but the wheels do not move at all at both 9&3 and 12&6. Can you explain what you mean by rolling road test?

Again don't know what model or year you have, but the wheel bearings on some years have the speed sender as part of the bearing and need to be installed correctly.

[speedyspaghetti]

Originally Posted by 911monty

Again don't know what model or year you have, but the wheel bearings on some years have the speed sender as part of the bearing and need to be installed correctly.

It's a 2002 S - it does not have PASM or TC, so I don't know if that has anything to do with it.

In regards to your other reply - thanks haha... it has been quite the journey. There have been times when I have wanted to just sell the car and maybe move onto a 60s Mustang to restore or an S2000 as an alternative to the Boxster... but I just love this car too much and I know how amazing it is when it is functioning properly... I don't want to give up on it yet.

As for the speed sensor - what could be tripping the ABS come on so frequently? Is there a way to check the speed sensor? When I replace the bearings, I did not notice any sort of sensor attached to them.

[911monty]

On your front and rear uprights there are two connectors, one is the brake pad wear sensor. The other is the speed sensor. You remove one bolt and pull the sensor out. make sure the hole the sensor inserts into is clean and you can see the reluctor rotating inside as you rotate the wheel. Also the sensor is magnetic and can become fouled by ferrous particles. Attached has the speed sensor. Usually recommended to remove while doing wheel bearings.

https://www.pelicanparts.com/catalog/SuperCat/1050/POR_1050_BRKHYD_pg4.htm#item17

[speedyspaghetti]

Originally Posted by 911monty

On your front and rear uprights there are two connectors, one is the brake pad wear sensor. The other is the speed sensor. You remove one bolt and pull the sensor out. make sure the hole the sensor inserts into is clean and you can see the reluctor rotating inside as you rotate the wheel. Also the sensor is magnetic and can become fouled by ferrous particles. Attached has the speed sensor. Usually recommended to remove while doing wheel bearings.

https://www.pelicanparts.com/catalog/SuperCat/1050/POR_1050_BRKHYD_pg4.htm#item17

Ah gotcha - yeah I had that removed when I did the bearing because I had to pull the caliper to get access and I undid this to get my wrench in there. Is it possible that it became faulty in some other way? Would it give a code?