1. Incorrect adjustment of light switch.. <
2.Master cylinder pistons not returning correctly.. <
3. Restricted brake lines or hoses.<< well that makes sense. If something got in there when you replace them. Or some how didnt get the hose on right..
4. Incorrect parking brake adjustment..<< NO
5. Caliper piston sticking...aka CALIPERS << well if they where your old ones id say yes, but since you replaced them it turns into a no..
Although maybe you got a bad one.. Something blocking the release of fluid inside. The two steel guide pins not lubed correctly to give a free movement. Ask parts store if you can replace it. It just might be a free and easy fix..
Well dig into it thats all I got..
give use a shout back and tell us what you find
good luck
JesseS
Feb 21, 2021 at 1:19 PM