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Air in brake master cylinder

bigalpha

Moderator
Location
Tucson, AZ
I swapped the driver front caliper on my 88 MJ. I bled the caliper until i saw no more air bubbles or dirty fluid come through.

When I start the truck, I can push the pedal almost through it's entire length of travel and it just goes pffssshhhshhhfffhshsshhhh. The brakes still mostly work but I know it's out of whack.

I think that I managed to suck air into the line at the caliper and up into the MC. Otherwise, the quart of brake fluid I put through it should have cleared out the caliper.

I then had someone press the brake pedal while I cracked open the fittings on the MC reservoir (that go down to the prop valve) and noticed no change. Should I crack the fittings at the prop valve and try the brake pedal press?
 
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