Ok so I changed my front rotors and pads almost 2 years ago and changed my rear pads and rotors last year.

When I press the brakes, my car pulls to the right.
Today, I upgraded my front brakes to the VTEC ones and I bled the fronts and I still have the same problem.

Does anyone have any idea what the problem is?

 

This could be as simple as just tire pressure or it can be as bad as a bent control arm (the case for my friends car). It could also be some issue of hydraulic pressure where both sides of the car are getting different amounts of brake fluid psi.
Tire pressure is easy enough to check, and if this was the case, one side would be REALLY flat.

Check all suspension components: i.e. Control Arms, Tie Rods, etc

Check your rotors for warpage. It could be a sticky caliper issue of some sort.

Check the hydraulic pressure.

 

The tire pressure I know is fine, and I will be changing the control arms soon. But there wasn't anything wrong with it before. The tie rods are new because I changed them when I did my auto to manual swap.

I highly doubt it's a sticky caliper issue because I changed my SI calipers for the VTEC's and I'm having the same problem.

We bled both sides after changing the calipers, how do I go about checking the hydraulic pressure?

 

alignment?

 

radius rod bushings could cause this problem. It would also cause the car to be out of alignment. Bad shocks can also cause the car to pull slightly under braking.

 

Maybe a bad tie rod? If it is replace and do alignment ASAP.

 

I'll check the radius rod bushings, but they looked fine when I put it back in the car after the manual swap. I'll be changing to the D2 suspension within the month. So hopefully, after I change, maybe the problem we cease.

I highly doubt it, after the alignment, the car was fine. It was maybe only about a few months ago I noticed this happening. I also did get an alignment after changing the tie rods.

 

I think there is a tester, but it could be because of a crimp/kink in the brake line. Let us know what you see when you get under there.

 

Proportioning valve in the brake System. More pressure to the front right.

Do you feel it pull in the steering wheel? that would indicate its the front for sure. If your car just kinda pulls to the right that its the back possibly.

 

Are you saying the prop valve being faulty is causing "uneven" brake pressure to the rear? Isn't there only one prop valve for both rear wheels? If there is, I would think both rear wheels would get the same amount of "uneven" pressure. Either both locking up or both not doing anything.