Brake pedal dropping to the floor

Reply Subscribe

Thread Tools

Search this Thread

08-06-2018, 07:01 AM

The slow hoe

Teching In

Thread Starter

Join Date: Apr 2018

Posts: 1

Likes: 0

Received 0 Likes on 0 Posts

Brake pedal dropping to the floor

I have 06 ex-trooper Tahoe I changed the calipers and pads all the way around bleed the brakes but didn't have much for a pedal. So I bleed the abs which didn't help so I changed the master cylinder and bled them all again. The brake pedal firms up a little bit when you pump it with the engine off but once you turn it on the pedal goes to floor and comes back up real slow. What do you guys think it could be its hydro boost too by the way.

Reply Like

08-06-2018, 07:46 AM

Atomic

I have a gauge for that

iTrader: (42)

Join Date: Jan 2006

Location: Huntsville, AL

Posts: 16,251

Likes: 67

Received 372 Likes on 253 Posts

You have air in the booster system, which can happen if you force the caliper open when changing pads. Bleed the power steering system.

Reply Like

08-06-2018, 09:27 AM

MrHorsepowerLSx

11 Second Club

iTrader: (13)

Join Date: Mar 2011

Location: NJ

Posts: 850

Likes: 0

Received 30 Likes on 30 Posts

A side note on a properly operating hydroboost setup, you can rest/press your foot on the brake pedal and start the motor. The brake pedal should drop .5-.75” and then return to top of pedal, when in proper operation