Brake Issue

Hi,
I have a 2002 Tundra V8 SR5 Access cab which I purchased brand new. It currently has 166k on the clock. For quite some time, I have been experiencing an intermittent issue when braking.

The brake pedal will get very hard to press and stopping distances are increased. This will go on for a while while driving and then all of sudden the pedal will return to normal and everything will work just fine again. Could the brake booster or the master cylinder be the problem? Does it make sense to try changing out the booster check valve or another component first before spending the money on another booster? Could a rear brake cylinder be the culprit?

The front brakes are fairly new as are the calipers and brake hoses and all are OEM parts. The rear shoes and cylinders are original.

Thanks!!!

 

A failing check valve can indeed cause what your experiencing. Master I’ve never seen cause a hard pedal. Usually always booster


But a booster can fail when a master leaks fluid into it too. So you’d want to check for thag before throwing a booster in.

check valves cheap, try it first

 

Thank you!!
I'll start with the new check valve.