Brake Sensor not depressed enough after brake flush.

Ainai · 02-10-2022, 04:36 AM

I changed the brake fluid in my car, the pedal is a bit softer, not mushy. When I went for a test drive I noticed I couldn't accelerate. I only got normal acceleration after putting my left foot under the brake pedal. Is there something I broke from smashing the brakes?

2011 Nismo#91 · 02-10-2022, 06:33 AM

Just put on the news and it will be depressed enough. But it's probably just air in the lines.

BGTV8 · 02-10-2022, 03:58 PM

^
What he said - bleed the brakes, you have residual air in the system

Rusty · 02-10-2022, 04:17 PM

Quote:

Originally Posted by BGTV8

^
What he said - bleed the brakes, you have residual air in the system

fryzia23 · 02-10-2022, 04:39 PM

it may be air in the lines or if you bled and emptied the reservoir before topping it off, you got air in master brake cylinder. This is much tougher to bleed.

Ainai · 02-10-2022, 06:17 PM

I bled again using a pressure bleeder, no bubbles came out, but the brakes felt firmer. Back to prebleed. The sensor still kept saying the brakes were pressed. I went to check the brake pedals, I moved the rubber stopper up 1/2 mm (barely) and vuala the brake sensors were pressed.
I placed a rubber band to lift the stopper up and that worked... I'll call it a day and take to a shop later.

02-10-2022, 04:36 AM	#1 (permalink)
Ainai Base Member Join Date: Dec 2019 Location: TX Posts: 22 Drives: 2010 TT Nissan 370z Rep Power: 3360	Brake Sensor not depressed enough after brake flush. I changed the brake fluid in my car, the pedal is a bit softer, not mushy. When I went for a test drive I noticed I couldn't accelerate. I only got normal acceleration after putting my left foot under the brake pedal. Is there something I broke from smashing the brakes?

02-10-2022, 06:33 AM	#2 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,400 Drives: slowly Rep Power: 40569	Just put on the news and it will be depressed enough. But it's probably just air in the lines. __________________ GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs

02-10-2022, 03:58 PM	#3 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,514 Drives: 09 Nissan 370Z M6 Rep Power: 39973	^ What he said - bleed the brakes, you have residual air in the system Rusty likes this.

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02-10-2022, 04:39 PM	#5 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	it may be air in the lines or if you bled and emptied the reservoir before topping it off, you got air in master brake cylinder. This is much tougher to bleed.

02-10-2022, 06:17 PM	#6 (permalink)
Ainai Base Member Join Date: Dec 2019 Location: TX Posts: 22 Drives: 2010 TT Nissan 370z Rep Power: 3360	I bled again using a pressure bleeder, no bubbles came out, but the brakes felt firmer. Back to prebleed. The sensor still kept saying the brakes were pressed. I went to check the brake pedals, I moved the rubber stopper up 1/2 mm (barely) and vuala the brake sensors were pressed. I placed a rubber band to lift the stopper up and that worked... I'll call it a day and take to a shop later.