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
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Sunday, February 21st, 2021 AT 1:19 PM