2012 Toyota Tundra - Brakes not working properly

When I press the brakes the car gradually comes to a stop. I have checked the following:

1. Brake fluid
2. Had brakes flushed
3. Brake pads are good
4. No leaks around master cylinder.

All the above have check out good!!!

Still it seems that if I slam on the brakes to a bit for it to kick in to come to a complete stop. Anyone seen this before???

 

Flex lines at the calipers may have gotten spongy.

 

Is there a way to troubleshoot?

 

Caliper piston could be stuck too if you exhausted easier options. Helped my friend with his 11' 4runner that had a stuck rear caliper piston but he didn't really notice decreased braking performance i don't think.

 

I had a 4runner that did this too, right front caliper.

 

Check your hose for damage. You could be loosing a bit of vacuum, causing this problem. Or your brake booster is going out. With less or no vacuum your brakes will take a bit to really bite down. Here is a link to help you test yours. https://www.carparts.com/blog/bad-brake-booster-symptoms/