[Dan]

Hi all, just recently replaced rear caliper (not OEM). I properly bleed and flushed system, no air in system as well no leaking fluid. But brakes doesn’t feel right. When engine run, I can floor brake pedal with effort (it’s braking good). When car not running, brake pedal is solid. 2007 Toyota Tundra. Any suggestions? Thanks in advance.

[Keith]

Is bleeder at top of caliper? Also, may need to purge air from abs module. GMs need a scan tool to do an automated bleed of abs pump to bleed brakes when components are replaced. Maybe that!

[Menasheh]

Brake booster, or vacuum pump.

[Harvey]

Normal with engine off, no vacuum assist
Did you replace more than one
How much fluid did you lose.
Guessing has ABS, need to bleed module
May need a scan tool to do properly

[Besticanafford]

Sounds like you may have the interior lining of one of your brake hoses in a kerfuffle.

[Steve]

Get in some gravel and do some ABS stops.

[Gabriel]

If you used vice grips, could have damaged the internal of the brake like, especially if you’re in a rusty area.

[Jean]

Apply parking brake while bleeding brakes. Then bleed calipers normally.

[Author]

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